/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:36:17,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:36:17,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:36:17,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:36:17,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:36:17,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:36:17,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:36:17,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:36:17,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:36:17,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:36:17,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:36:17,373 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:36:17,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:36:17,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:36:17,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:36:17,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:36:17,375 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:36:17,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:36:17,376 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:36:17,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:36:17,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:36:17,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:36:17,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:36:17,602 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:36:17,604 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:36:17,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl [2021-06-05 14:36:17,607 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl' [2021-06-05 14:36:17,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:36:17,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:36:17,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:36:17,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:36:17,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:36:17,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:36:17,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:36:17,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:36:17,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:36:17,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... [2021-06-05 14:36:17,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:36:17,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:36:17,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:36:17,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:36:17,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:36:17,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:36:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:36:17,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:36:17,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:36:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:36:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:36:17,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:36:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:36:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:36:17,727 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:36:18,132 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:36:18,132 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 14:36:18,134 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:36:18 BoogieIcfgContainer [2021-06-05 14:36:18,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:36:18,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:36:18,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:36:18,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:36:18,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:36:17" (1/2) ... [2021-06-05 14:36:18,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fdfc91 and model type nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:36:18, skipping insertion in model container [2021-06-05 14:36:18,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:36:18" (2/2) ... [2021-06-05 14:36:18,141 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-symm.wvr.bpl [2021-06-05 14:36:18,145 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:36:18,145 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:36:18,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:36:18,147 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:36:18,184 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:36:18,199 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:36:18,223 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:36:18,223 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:36:18,223 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:36:18,223 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:36:18,223 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:36:18,223 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:36:18,223 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:36:18,223 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:36:18,231 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-06-05 14:36:18,239 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:36:18,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,245 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1169398602, now seen corresponding path program 1 times [2021-06-05 14:36:18,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567502000] [2021-06-05 14:36:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567502000] [2021-06-05 14:36:18,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567502000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:36:18,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:36:18,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:36:18,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779772013] [2021-06-05 14:36:18,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:36:18,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:36:18,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:36:18,473 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,542 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-06-05 14:36:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:36:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:36:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,548 INFO L225 Difference]: With dead ends: 52 [2021-06-05 14:36:18,548 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 14:36:18,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:36:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 14:36:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-06-05 14:36:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-06-05 14:36:18,568 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-06-05 14:36:18,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,569 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-06-05 14:36:18,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-06-05 14:36:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:36:18,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,569 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:36:18,570 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1342257354, now seen corresponding path program 2 times [2021-06-05 14:36:18,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150811378] [2021-06-05 14:36:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150811378] [2021-06-05 14:36:18,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150811378] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:36:18,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:36:18,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:36:18,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429529879] [2021-06-05 14:36:18,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:36:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:36:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:36:18,727 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,792 INFO L93 Difference]: Finished difference Result 48 states and 88 transitions. [2021-06-05 14:36:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:36:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:36:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,793 INFO L225 Difference]: With dead ends: 48 [2021-06-05 14:36:18,793 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 14:36:18,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:36:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 14:36:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-06-05 14:36:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 63 transitions. [2021-06-05 14:36:18,805 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 63 transitions. Word has length 10 [2021-06-05 14:36:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,806 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 63 transitions. [2021-06-05 14:36:18,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 63 transitions. [2021-06-05 14:36:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:36:18,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,807 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:36:18,808 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1169517215, now seen corresponding path program 1 times [2021-06-05 14:36:18,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380257534] [2021-06-05 14:36:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380257534] [2021-06-05 14:36:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380257534] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:36:18,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:36:18,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:36:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23953695] [2021-06-05 14:36:18,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:36:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:36:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,846 INFO L87 Difference]: Start difference. First operand 30 states and 63 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,860 INFO L93 Difference]: Finished difference Result 35 states and 74 transitions. [2021-06-05 14:36:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:36:18,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:36:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,862 INFO L225 Difference]: With dead ends: 35 [2021-06-05 14:36:18,863 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 14:36:18,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 14:36:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-06-05 14:36:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 74 transitions. [2021-06-05 14:36:18,866 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 74 transitions. Word has length 11 [2021-06-05 14:36:18,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,866 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 74 transitions. [2021-06-05 14:36:18,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 74 transitions. [2021-06-05 14:36:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:36:18,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,867 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:36:18,867 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1198603722, now seen corresponding path program 1 times [2021-06-05 14:36:18,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626213453] [2021-06-05 14:36:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626213453] [2021-06-05 14:36:18,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626213453] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:36:18,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:36:18,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:36:18,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526008332] [2021-06-05 14:36:18,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:36:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:36:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,883 INFO L87 Difference]: Start difference. First operand 35 states and 74 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,891 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-06-05 14:36:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:36:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:36:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,894 INFO L225 Difference]: With dead ends: 35 [2021-06-05 14:36:18,894 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 14:36:18,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 14:36:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-06-05 14:36:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-06-05 14:36:18,901 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 11 [2021-06-05 14:36:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,901 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-06-05 14:36:18,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-06-05 14:36:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:36:18,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:36:18,902 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1658290196, now seen corresponding path program 1 times [2021-06-05 14:36:18,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441616841] [2021-06-05 14:36:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:36:18,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441616841] [2021-06-05 14:36:18,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441616841] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:36:18,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:36:18,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:36:18,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279006813] [2021-06-05 14:36:18,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:36:18,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:36:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,935 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,937 INFO L93 Difference]: Finished difference Result 35 states and 64 transitions. [2021-06-05 14:36:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:36:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:36:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,938 INFO L225 Difference]: With dead ends: 35 [2021-06-05 14:36:18,938 INFO L226 Difference]: Without dead ends: 33 [2021-06-05 14:36:18,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-06-05 14:36:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-06-05 14:36:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 14:36:18,940 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 14:36:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,940 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 14:36:18,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 14:36:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:36:18,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:36:18,941 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1206692648, now seen corresponding path program 1 times [2021-06-05 14:36:18,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082637513] [2021-06-05 14:36:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:36:18,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082637513] [2021-06-05 14:36:18,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082637513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:36:18,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:36:18,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:36:18,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418106164] [2021-06-05 14:36:18,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:36:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:36:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,957 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,961 INFO L93 Difference]: Finished difference Result 39 states and 74 transitions. [2021-06-05 14:36:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:36:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:36:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,961 INFO L225 Difference]: With dead ends: 39 [2021-06-05 14:36:18,962 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 14:36:18,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:36:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 14:36:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 14:36:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 14:36:18,964 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 14:36:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,964 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 14:36:18,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 14:36:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:18,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:36:18,965 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2083951382, now seen corresponding path program 1 times [2021-06-05 14:36:18,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51638012] [2021-06-05 14:36:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:19,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:19,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51638012] [2021-06-05 14:36:19,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51638012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:19,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554876835] [2021-06-05 14:36:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:36:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:19,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554876835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:19,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:19,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:36:19,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748696398] [2021-06-05 14:36:19,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:19,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:19,582 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,823 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 14:36:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:20,487 INFO L93 Difference]: Finished difference Result 106 states and 207 transitions. [2021-06-05 14:36:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:36:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:20,488 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:36:20,488 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:36:20,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 996.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:36:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:36:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-06-05 14:36:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-06-05 14:36:20,492 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-06-05 14:36:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:20,492 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-06-05 14:36:20,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-06-05 14:36:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:20,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:20,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:20,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 14:36:20,708 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash 417341116, now seen corresponding path program 2 times [2021-06-05 14:36:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:20,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765834260] [2021-06-05 14:36:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:20,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:20,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765834260] [2021-06-05 14:36:20,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765834260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:20,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279272486] [2021-06-05 14:36:20,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:20,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:20,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:36:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:21,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:21,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:21,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:21,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:21,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:21,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:21,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:21,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:21,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:21,460 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:36:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:21,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279272486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:21,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:21,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:36:21,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583029857] [2021-06-05 14:36:21,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:21,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:21,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:21,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:21,537 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:21,762 INFO L93 Difference]: Finished difference Result 68 states and 130 transitions. [2021-06-05 14:36:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:21,762 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:36:21,763 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 14:36:21,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 14:36:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2021-06-05 14:36:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-06-05 14:36:21,765 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-06-05 14:36:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:21,765 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-06-05 14:36:21,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-06-05 14:36:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:21,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:21,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:21,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:36:21,977 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash -61943560, now seen corresponding path program 3 times [2021-06-05 14:36:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:21,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143823369] [2021-06-05 14:36:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:22,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143823369] [2021-06-05 14:36:22,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143823369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94309554] [2021-06-05 14:36:22,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:22,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:22,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:36:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:22,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:22,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:22,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:22,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:22,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:22,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:22,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:22,417 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:22,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:22,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:22,441 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:22,445 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:22,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:22,496 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:36:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94309554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:22,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:36:22,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288967964] [2021-06-05 14:36:22,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:22,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:22,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:22,695 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:22,949 INFO L93 Difference]: Finished difference Result 86 states and 154 transitions. [2021-06-05 14:36:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:22,950 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:36:22,950 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 14:36:22,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 414.8ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 14:36:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-06-05 14:36:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 94 transitions. [2021-06-05 14:36:22,953 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 94 transitions. Word has length 14 [2021-06-05 14:36:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:22,953 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 94 transitions. [2021-06-05 14:36:22,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 94 transitions. [2021-06-05 14:36:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:22,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:22,954 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:23,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 14:36:23,154 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash -597173362, now seen corresponding path program 4 times [2021-06-05 14:36:23,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:23,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205594802] [2021-06-05 14:36:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:23,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:23,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205594802] [2021-06-05 14:36:23,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205594802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:23,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629085925] [2021-06-05 14:36:23,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:23,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:23,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:36:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:23,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:23,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:23,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:23,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:23,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:23,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:23,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:23,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:23,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:23,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:23,685 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:23,689 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:23,694 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:23,698 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:23,702 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:23,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:36:23,771 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 14:36:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:23,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629085925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:23,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:23,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:36:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672866319] [2021-06-05 14:36:23,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:23,946 INFO L87 Difference]: Start difference. First operand 47 states and 94 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:24,090 INFO L93 Difference]: Finished difference Result 67 states and 128 transitions. [2021-06-05 14:36:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:24,091 INFO L225 Difference]: With dead ends: 67 [2021-06-05 14:36:24,091 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 14:36:24,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 14:36:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-06-05 14:36:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 102 transitions. [2021-06-05 14:36:24,094 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 102 transitions. Word has length 14 [2021-06-05 14:36:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:24,094 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 102 transitions. [2021-06-05 14:36:24,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 102 transitions. [2021-06-05 14:36:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:24,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:24,094 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:24,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:24,313 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 682715498, now seen corresponding path program 5 times [2021-06-05 14:36:24,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:24,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478416381] [2021-06-05 14:36:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:24,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:24,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478416381] [2021-06-05 14:36:24,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478416381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:24,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735817724] [2021-06-05 14:36:24,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:24,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:24,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:24,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:36:24,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:24,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735817724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:24,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:24,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:36:24,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473331237] [2021-06-05 14:36:24,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:24,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:24,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:24,759 INFO L87 Difference]: Start difference. First operand 51 states and 102 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:25,036 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2021-06-05 14:36:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:25,037 INFO L225 Difference]: With dead ends: 72 [2021-06-05 14:36:25,037 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:36:25,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:36:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-06-05 14:36:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 104 transitions. [2021-06-05 14:36:25,040 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 104 transitions. Word has length 14 [2021-06-05 14:36:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:25,040 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 104 transitions. [2021-06-05 14:36:25,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 104 transitions. [2021-06-05 14:36:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:25,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:25,040 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:25,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 14:36:25,256 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash 203430822, now seen corresponding path program 6 times [2021-06-05 14:36:25,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:25,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771556216] [2021-06-05 14:36:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:25,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771556216] [2021-06-05 14:36:25,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771556216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933744512] [2021-06-05 14:36:25,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:25,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:36:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:25,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:25,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:25,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:25,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:25,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:25,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:25,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:25,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:25,692 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:25,696 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:25,699 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,787 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 14:36:25,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:25,791 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:165, output treesize:95 [2021-06-05 14:36:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933744512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:25,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:25,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:36:25,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176338840] [2021-06-05 14:36:25,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:25,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:25,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:25,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:25,951 INFO L87 Difference]: Start difference. First operand 52 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:26,079 INFO L93 Difference]: Finished difference Result 68 states and 134 transitions. [2021-06-05 14:36:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:26,080 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:36:26,080 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 14:36:26,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 14:36:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2021-06-05 14:36:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 102 transitions. [2021-06-05 14:36:26,082 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 102 transitions. Word has length 14 [2021-06-05 14:36:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:26,083 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 102 transitions. [2021-06-05 14:36:26,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 102 transitions. [2021-06-05 14:36:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:26,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:26,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:26,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,299 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash -331798980, now seen corresponding path program 7 times [2021-06-05 14:36:26,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:26,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383612010] [2021-06-05 14:36:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:26,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383612010] [2021-06-05 14:36:26,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383612010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835411547] [2021-06-05 14:36:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:36:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:26,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:26,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:26,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:26,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:26,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:26,689 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:26,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:26,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:26,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:26,763 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:26,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:26,771 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:26,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:26,825 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 14:36:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835411547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:26,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:36:26,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863566523] [2021-06-05 14:36:26,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:26,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:26,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:26,980 INFO L87 Difference]: Start difference. First operand 51 states and 102 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:27,118 INFO L93 Difference]: Finished difference Result 72 states and 138 transitions. [2021-06-05 14:36:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:27,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:27,119 INFO L225 Difference]: With dead ends: 72 [2021-06-05 14:36:27,119 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 14:36:27,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 14:36:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-06-05 14:36:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 102 transitions. [2021-06-05 14:36:27,121 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 102 transitions. Word has length 14 [2021-06-05 14:36:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:27,121 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 102 transitions. [2021-06-05 14:36:27,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 102 transitions. [2021-06-05 14:36:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:36:27,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:27,121 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:27,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 14:36:27,329 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1350037930, now seen corresponding path program 8 times [2021-06-05 14:36:27,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:27,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829772928] [2021-06-05 14:36:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:27,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:27,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829772928] [2021-06-05 14:36:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829772928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:27,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355309424] [2021-06-05 14:36:27,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:27,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:27,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:36:27,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:27,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355309424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:27,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:27,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:36:27,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597800804] [2021-06-05 14:36:27,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:27,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:27,685 INFO L87 Difference]: Start difference. First operand 51 states and 102 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:27,892 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 14:36:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:27,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:36:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:27,893 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:36:27,893 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:36:27,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:36:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:36:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-06-05 14:36:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-06-05 14:36:27,895 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 14 [2021-06-05 14:36:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:27,895 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-06-05 14:36:27,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-06-05 14:36:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:27,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:27,895 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:28,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 14:36:28,096 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1533970817, now seen corresponding path program 9 times [2021-06-05 14:36:28,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:28,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007247744] [2021-06-05 14:36:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007247744] [2021-06-05 14:36:28,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007247744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659716193] [2021-06-05 14:36:28,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:28,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:28,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:28,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659716193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:28,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:36:28,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431165449] [2021-06-05 14:36:28,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:36:28,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:28,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:36:28,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:36:28,195 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:28,249 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2021-06-05 14:36:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:28,249 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:36:28,250 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:36:28,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:36:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2021-06-05 14:36:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 14:36:28,252 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 14:36:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:28,252 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 14:36:28,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 14:36:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:28,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:28,252 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:28,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 14:36:28,468 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash 967321681, now seen corresponding path program 10 times [2021-06-05 14:36:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:28,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925699181] [2021-06-05 14:36:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:28,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925699181] [2021-06-05 14:36:28,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925699181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727096177] [2021-06-05 14:36:28,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:28,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727096177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:28,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:36:28,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964827539] [2021-06-05 14:36:28,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:36:28,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:36:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:36:28,591 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:28,638 INFO L93 Difference]: Finished difference Result 78 states and 156 transitions. [2021-06-05 14:36:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:28,638 INFO L225 Difference]: With dead ends: 78 [2021-06-05 14:36:28,638 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:36:28,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:36:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-06-05 14:36:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2021-06-05 14:36:28,641 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2021-06-05 14:36:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:28,641 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2021-06-05 14:36:28,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2021-06-05 14:36:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:28,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:28,641 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:28,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,862 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash -47192797, now seen corresponding path program 11 times [2021-06-05 14:36:28,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:28,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111195564] [2021-06-05 14:36:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111195564] [2021-06-05 14:36:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111195564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178197307] [2021-06-05 14:36:28,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:28,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:28,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:28,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178197307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:29,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:36:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957986786] [2021-06-05 14:36:29,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:36:29,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:29,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:36:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:36:29,011 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:29,094 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-06-05 14:36:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:29,094 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:36:29,094 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:36:29,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:36:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-06-05 14:36:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2021-06-05 14:36:29,096 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 15 [2021-06-05 14:36:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:29,096 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2021-06-05 14:36:29,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2021-06-05 14:36:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:29,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:29,097 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:29,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 14:36:29,309 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -15245844, now seen corresponding path program 12 times [2021-06-05 14:36:29,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:29,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585502015] [2021-06-05 14:36:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:29,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585502015] [2021-06-05 14:36:29,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585502015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787647389] [2021-06-05 14:36:29,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:29,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:29,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:29,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787647389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:29,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:29,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997701099] [2021-06-05 14:36:29,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:29,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:29,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:29,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:29,478 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:29,655 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 14:36:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:29,656 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:36:29,656 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:36:29,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:36:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-06-05 14:36:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.078125) internal successors, (133), 64 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 133 transitions. [2021-06-05 14:36:29,658 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 133 transitions. Word has length 15 [2021-06-05 14:36:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:29,658 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 133 transitions. [2021-06-05 14:36:29,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 133 transitions. [2021-06-05 14:36:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:29,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:29,659 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:29,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 14:36:29,869 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:29,869 INFO L82 PathProgramCache]: Analyzing trace with hash -494530520, now seen corresponding path program 13 times [2021-06-05 14:36:29,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:29,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841894847] [2021-06-05 14:36:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:29,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841894847] [2021-06-05 14:36:29,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841894847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921544859] [2021-06-05 14:36:29,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:29,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:29,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921544859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:30,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476243292] [2021-06-05 14:36:30,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:30,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:30,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:30,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:30,029 INFO L87 Difference]: Start difference. First operand 65 states and 133 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:30,113 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-06-05 14:36:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:30,114 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:36:30,114 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:36:30,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:36:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-06-05 14:36:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-06-05 14:36:30,115 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-06-05 14:36:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:30,115 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-06-05 14:36:30,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-06-05 14:36:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:30,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:30,116 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:30,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 14:36:30,329 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1824775283, now seen corresponding path program 14 times [2021-06-05 14:36:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:30,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2991352] [2021-06-05 14:36:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:30,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2991352] [2021-06-05 14:36:30,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2991352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521660580] [2021-06-05 14:36:30,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:30,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:30,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521660580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:30,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:36:30,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041324117] [2021-06-05 14:36:30,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:36:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:30,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:36:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:36:30,466 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:30,519 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-06-05 14:36:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:30,520 INFO L225 Difference]: With dead ends: 70 [2021-06-05 14:36:30,520 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 14:36:30,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 14:36:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-06-05 14:36:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-06-05 14:36:30,522 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-06-05 14:36:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:30,522 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-06-05 14:36:30,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-06-05 14:36:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:30,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:30,522 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:30,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:30,733 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1774400641, now seen corresponding path program 15 times [2021-06-05 14:36:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:30,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952514296] [2021-06-05 14:36:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:30,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952514296] [2021-06-05 14:36:30,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952514296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289004347] [2021-06-05 14:36:30,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:30,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:30,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:30,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:30,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289004347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:30,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:30,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139191667] [2021-06-05 14:36:30,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:30,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:30,952 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:30,997 INFO L93 Difference]: Finished difference Result 76 states and 153 transitions. [2021-06-05 14:36:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:30,998 INFO L225 Difference]: With dead ends: 76 [2021-06-05 14:36:30,998 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:36:30,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:36:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-06-05 14:36:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-06-05 14:36:30,999 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-06-05 14:36:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:30,999 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-06-05 14:36:30,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-06-05 14:36:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:31,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:31,000 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:31,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 14:36:31,200 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1090194731, now seen corresponding path program 16 times [2021-06-05 14:36:31,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:31,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617926593] [2021-06-05 14:36:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:31,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617926593] [2021-06-05 14:36:31,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617926593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387641306] [2021-06-05 14:36:31,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:31,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:31,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387641306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:31,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:31,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594795891] [2021-06-05 14:36:31,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:31,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:31,816 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:31,853 INFO L93 Difference]: Finished difference Result 80 states and 160 transitions. [2021-06-05 14:36:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:31,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:31,854 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:36:31,854 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:36:31,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:36:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-06-05 14:36:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:36:31,855 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 14:36:31,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:31,855 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:36:31,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:36:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:31,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:31,856 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:32,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:32,069 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1058714454, now seen corresponding path program 17 times [2021-06-05 14:36:32,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:32,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880697254] [2021-06-05 14:36:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:32,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880697254] [2021-06-05 14:36:32,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880697254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307759669] [2021-06-05 14:36:32,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:32,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:32,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:32,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:32,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307759669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:32,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:36:32,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219427533] [2021-06-05 14:36:32,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:36:32,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:36:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:32,259 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:32,292 INFO L93 Difference]: Finished difference Result 66 states and 131 transitions. [2021-06-05 14:36:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:32,293 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:36:32,293 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 14:36:32,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 14:36:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-06-05 14:36:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 14:36:32,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 14:36:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:32,295 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 14:36:32,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 14:36:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:32,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:32,295 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:32,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 14:36:32,509 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:32,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2093797499, now seen corresponding path program 18 times [2021-06-05 14:36:32,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:32,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403866460] [2021-06-05 14:36:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:32,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403866460] [2021-06-05 14:36:32,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403866460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911147961] [2021-06-05 14:36:32,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:32,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:32,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:32,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911147961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:32,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:32,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624678445] [2021-06-05 14:36:32,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:32,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:32,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:32,767 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:32,802 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 14:36:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:32,804 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:36:32,804 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:36:32,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:36:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-06-05 14:36:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2021-06-05 14:36:32,806 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2021-06-05 14:36:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:32,806 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2021-06-05 14:36:32,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2021-06-05 14:36:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:32,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:32,806 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:33,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 14:36:33,022 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1646459776, now seen corresponding path program 19 times [2021-06-05 14:36:33,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:33,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045271638] [2021-06-05 14:36:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:33,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045271638] [2021-06-05 14:36:33,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045271638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415177194] [2021-06-05 14:36:33,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:33,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:33,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:33,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:33,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:33,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:33,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:33,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:33,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:36:33,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:33,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:33,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:36:33,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:33,356 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,424 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:36:33,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:33,427 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,451 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:36:33,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:36:33,452 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:36:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415177194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:33,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:33,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575344560] [2021-06-05 14:36:33,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:33,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:33,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:33,471 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:33,548 INFO L93 Difference]: Finished difference Result 100 states and 189 transitions. [2021-06-05 14:36:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:33,549 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:36:33,549 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:36:33,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:36:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2021-06-05 14:36:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2021-06-05 14:36:33,551 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 15 [2021-06-05 14:36:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:33,551 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2021-06-05 14:36:33,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2021-06-05 14:36:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:33,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:33,551 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:33,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 14:36:33,767 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:33,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1111229974, now seen corresponding path program 20 times [2021-06-05 14:36:33,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:33,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496727248] [2021-06-05 14:36:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:33,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496727248] [2021-06-05 14:36:33,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496727248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334399687] [2021-06-05 14:36:33,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:33,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:33,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:33,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:33,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:33,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:33,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:33,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:36:33,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:33,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:36:33,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:34,001 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:36:34,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:34,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:34,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:34,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:36:34,009 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:36:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334399687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:34,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:34,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327925049] [2021-06-05 14:36:34,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:34,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:34,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:34,016 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:34,039 INFO L93 Difference]: Finished difference Result 73 states and 145 transitions. [2021-06-05 14:36:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:34,040 INFO L225 Difference]: With dead ends: 73 [2021-06-05 14:36:34,040 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 14:36:34,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 14:36:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 14:36:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2021-06-05 14:36:34,043 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2021-06-05 14:36:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:34,043 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2021-06-05 14:36:34,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2021-06-05 14:36:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:34,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:34,043 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:34,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-06-05 14:36:34,257 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash 746509439, now seen corresponding path program 21 times [2021-06-05 14:36:34,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:34,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944307678] [2021-06-05 14:36:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:34,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944307678] [2021-06-05 14:36:34,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944307678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363152908] [2021-06-05 14:36:34,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:34,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:34,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363152908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:34,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486338259] [2021-06-05 14:36:34,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:34,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:34,453 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:34,509 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-06-05 14:36:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:34,510 INFO L225 Difference]: With dead ends: 71 [2021-06-05 14:36:34,510 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 14:36:34,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 14:36:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-06-05 14:36:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2021-06-05 14:36:34,511 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2021-06-05 14:36:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:34,511 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2021-06-05 14:36:34,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2021-06-05 14:36:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:34,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:34,512 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:34,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 14:36:34,728 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:34,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2137729391, now seen corresponding path program 22 times [2021-06-05 14:36:34,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:34,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992169696] [2021-06-05 14:36:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992169696] [2021-06-05 14:36:34,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992169696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59278760] [2021-06-05 14:36:34,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:34,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:34,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:34,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:36:34,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:34,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:34,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:36:34,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:34,933 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:36:34,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:34,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:34,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:34,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:36:34,941 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:36:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59278760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:34,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:34,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294749093] [2021-06-05 14:36:34,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:34,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:34,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:34,947 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:34,976 INFO L93 Difference]: Finished difference Result 68 states and 136 transitions. [2021-06-05 14:36:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:34,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:34,977 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:36:34,977 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 14:36:34,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 14:36:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-06-05 14:36:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2021-06-05 14:36:34,983 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2021-06-05 14:36:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:34,983 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2021-06-05 14:36:34,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2021-06-05 14:36:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:34,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:34,984 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:35,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,197 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1142723427, now seen corresponding path program 23 times [2021-06-05 14:36:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:35,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518865715] [2021-06-05 14:36:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:35,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518865715] [2021-06-05 14:36:35,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518865715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447366901] [2021-06-05 14:36:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:35,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447366901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:35,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:36:35,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584074512] [2021-06-05 14:36:35,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:36:35,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:35,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:36:35,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:35,349 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:35,448 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 14:36:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:35,449 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:36:35,449 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:36:35,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:36:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2021-06-05 14:36:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-06-05 14:36:35,451 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-06-05 14:36:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:35,451 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-06-05 14:36:35,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-06-05 14:36:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:35,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:35,451 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:35,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,659 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1174670380, now seen corresponding path program 24 times [2021-06-05 14:36:35,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:35,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790370402] [2021-06-05 14:36:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790370402] [2021-06-05 14:36:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790370402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157709744] [2021-06-05 14:36:35,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:35,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:35,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:35,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157709744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:35,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51359007] [2021-06-05 14:36:35,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:35,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:35,922 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:36,000 INFO L93 Difference]: Finished difference Result 86 states and 162 transitions. [2021-06-05 14:36:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:36,001 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:36:36,001 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:36:36,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:36:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2021-06-05 14:36:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 132 transitions. [2021-06-05 14:36:36,002 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 132 transitions. Word has length 15 [2021-06-05 14:36:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:36,003 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 132 transitions. [2021-06-05 14:36:36,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 132 transitions. [2021-06-05 14:36:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:36,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:36,003 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:36,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,217 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:36,217 INFO L82 PathProgramCache]: Analyzing trace with hash 695385704, now seen corresponding path program 25 times [2021-06-05 14:36:36,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:36,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587149767] [2021-06-05 14:36:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587149767] [2021-06-05 14:36:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587149767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290849466] [2021-06-05 14:36:36,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290849466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:36,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034841141] [2021-06-05 14:36:36,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:36,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:36,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:36,442 INFO L87 Difference]: Start difference. First operand 65 states and 132 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:36,493 INFO L93 Difference]: Finished difference Result 69 states and 138 transitions. [2021-06-05 14:36:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:36,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:36,494 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:36:36,494 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:36:36,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:36:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-06-05 14:36:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-06-05 14:36:36,496 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-06-05 14:36:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:36,496 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-06-05 14:36:36,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-06-05 14:36:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:36,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:36,497 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:36,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 14:36:36,713 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1280275789, now seen corresponding path program 26 times [2021-06-05 14:36:36,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:36,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200435573] [2021-06-05 14:36:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:36,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200435573] [2021-06-05 14:36:36,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200435573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500074345] [2021-06-05 14:36:36,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:36,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:36,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:36,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:36,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:36:36,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:36:36,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:36,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:36,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,981 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-06-05 14:36:36,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:36,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,013 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:36:37,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:36:37,014 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:36:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500074345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:37,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:37,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18755888] [2021-06-05 14:36:37,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:37,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:37,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:37,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:37,035 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:37,074 INFO L93 Difference]: Finished difference Result 71 states and 140 transitions. [2021-06-05 14:36:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:37,074 INFO L225 Difference]: With dead ends: 71 [2021-06-05 14:36:37,074 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:36:37,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:36:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2021-06-05 14:36:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 14:36:37,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 14:36:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:37,077 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 14:36:37,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 14:36:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:37,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:37,078 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:37,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,285 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:37,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1730468749, now seen corresponding path program 27 times [2021-06-05 14:36:37,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:37,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551164648] [2021-06-05 14:36:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:37,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551164648] [2021-06-05 14:36:37,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551164648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584158766] [2021-06-05 14:36:37,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:37,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:37,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:37,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:37,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:37,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:37,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:36:37,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:37,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,548 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-06-05 14:36:37,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:37,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:37,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:37,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:37,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:37,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:37,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:36:37,624 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:36:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584158766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:37,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:37,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201856751] [2021-06-05 14:36:37,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:37,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:37,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:37,653 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:37,687 INFO L93 Difference]: Finished difference Result 78 states and 147 transitions. [2021-06-05 14:36:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:37,688 INFO L225 Difference]: With dead ends: 78 [2021-06-05 14:36:37,688 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:36:37,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:37,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:36:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-06-05 14:36:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 14:36:37,689 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 14:36:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:37,689 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 14:36:37,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 14:36:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:37,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:37,690 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:37,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable714 [2021-06-05 14:36:37,906 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:37,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1283131026, now seen corresponding path program 28 times [2021-06-05 14:36:37,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:37,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685679884] [2021-06-05 14:36:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685679884] [2021-06-05 14:36:37,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685679884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346362670] [2021-06-05 14:36:37,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:37,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346362670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:38,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:38,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657991468] [2021-06-05 14:36:38,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:38,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:38,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:38,401 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:38,491 INFO L93 Difference]: Finished difference Result 99 states and 187 transitions. [2021-06-05 14:36:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:38,492 INFO L225 Difference]: With dead ends: 99 [2021-06-05 14:36:38,492 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:36:38,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:36:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2021-06-05 14:36:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2021-06-05 14:36:38,493 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2021-06-05 14:36:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:38,493 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2021-06-05 14:36:38,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2021-06-05 14:36:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:38,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:38,494 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:38,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,709 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash 747901224, now seen corresponding path program 29 times [2021-06-05 14:36:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:38,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113514643] [2021-06-05 14:36:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:38,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113514643] [2021-06-05 14:36:38,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113514643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168803675] [2021-06-05 14:36:38,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:38,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168803675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:38,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:38,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315142956] [2021-06-05 14:36:38,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:38,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:38,886 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:38,997 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-06-05 14:36:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:39,001 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:36:39,001 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:36:39,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:36:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 14:36:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 14:36:39,002 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 14:36:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:39,003 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 14:36:39,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 14:36:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:39,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:39,004 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:39,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable830 [2021-06-05 14:36:39,209 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash 383180689, now seen corresponding path program 30 times [2021-06-05 14:36:39,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:39,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231092136] [2021-06-05 14:36:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:39,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231092136] [2021-06-05 14:36:39,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231092136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309735896] [2021-06-05 14:36:39,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:39,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:39,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309735896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:39,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:39,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692465039] [2021-06-05 14:36:39,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:39,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:39,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:39,507 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:39,628 INFO L93 Difference]: Finished difference Result 62 states and 120 transitions. [2021-06-05 14:36:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:39,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:39,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:39,637 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:36:39,637 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 14:36:39,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 14:36:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-06-05 14:36:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 14:36:39,639 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 14:36:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:39,639 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 14:36:39,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 14:36:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:39,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:39,639 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:39,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,855 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:39,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1967161889, now seen corresponding path program 31 times [2021-06-05 14:36:39,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:39,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96063372] [2021-06-05 14:36:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:39,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96063372] [2021-06-05 14:36:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96063372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438499536] [2021-06-05 14:36:39,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:39,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:39,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438499536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:40,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:40,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61658822] [2021-06-05 14:36:40,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:40,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:40,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:40,019 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:40,098 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2021-06-05 14:36:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:40,099 INFO L225 Difference]: With dead ends: 78 [2021-06-05 14:36:40,099 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:36:40,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:36:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-06-05 14:36:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 14:36:40,100 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 14:36:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:40,101 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 14:36:40,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 14:36:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:40,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:40,101 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:40,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-06-05 14:36:40,309 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1935214936, now seen corresponding path program 32 times [2021-06-05 14:36:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:40,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462837657] [2021-06-05 14:36:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462837657] [2021-06-05 14:36:40,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462837657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321784807] [2021-06-05 14:36:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:40,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321784807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:36:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102623567] [2021-06-05 14:36:40,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:36:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:36:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:36:40,440 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:40,496 INFO L93 Difference]: Finished difference Result 86 states and 159 transitions. [2021-06-05 14:36:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:40,496 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:36:40,496 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:36:40,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:36:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-06-05 14:36:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:36:40,498 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:36:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:40,498 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:36:40,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:36:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:40,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:40,498 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:40,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-06-05 14:36:40,713 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1880467684, now seen corresponding path program 33 times [2021-06-05 14:36:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:40,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620855977] [2021-06-05 14:36:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:40,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620855977] [2021-06-05 14:36:40,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620855977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392257499] [2021-06-05 14:36:40,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:40,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:40,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:40,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392257499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:40,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:36:40,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995143599] [2021-06-05 14:36:40,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:36:40,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:36:40,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:36:40,835 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:40,919 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2021-06-05 14:36:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:40,920 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:36:40,920 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:36:40,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:36:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-06-05 14:36:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:36:40,921 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:36:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:40,921 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:36:40,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:36:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:40,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:40,921 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:41,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable889,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,137 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash -95193809, now seen corresponding path program 34 times [2021-06-05 14:36:41,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:41,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859513567] [2021-06-05 14:36:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:41,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859513567] [2021-06-05 14:36:41,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859513567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935817685] [2021-06-05 14:36:41,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:41,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:41,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935817685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:41,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:41,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768108355] [2021-06-05 14:36:41,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:41,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:41,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:41,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:41,299 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:41,445 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 14:36:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:36:41,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:41,446 INFO L225 Difference]: With dead ends: 82 [2021-06-05 14:36:41,446 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:36:41,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:36:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-06-05 14:36:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:36:41,447 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 14:36:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:41,447 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:36:41,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:36:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:41,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:41,448 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:41,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable897 [2021-06-05 14:36:41,653 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1345237882, now seen corresponding path program 35 times [2021-06-05 14:36:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:41,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840093454] [2021-06-05 14:36:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:41,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840093454] [2021-06-05 14:36:41,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840093454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848060419] [2021-06-05 14:36:41,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848060419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:41,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:36:41,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384198964] [2021-06-05 14:36:41,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:36:41,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:41,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:36:41,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:36:41,781 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:41,852 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-06-05 14:36:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:41,852 INFO L225 Difference]: With dead ends: 73 [2021-06-05 14:36:41,852 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 14:36:41,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 14:36:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 14:36:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:36:41,854 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 14:36:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:41,854 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:36:41,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:36:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:41,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:41,854 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:42,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,054 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash 980517347, now seen corresponding path program 36 times [2021-06-05 14:36:42,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:42,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147092550] [2021-06-05 14:36:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:42,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147092550] [2021-06-05 14:36:42,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147092550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851692137] [2021-06-05 14:36:42,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:42,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:42,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851692137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:42,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:36:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868262597] [2021-06-05 14:36:42,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:36:42,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:36:42,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:42,225 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:42,297 INFO L93 Difference]: Finished difference Result 79 states and 144 transitions. [2021-06-05 14:36:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:42,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:42,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:42,298 INFO L225 Difference]: With dead ends: 79 [2021-06-05 14:36:42,298 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 14:36:42,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 14:36:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-06-05 14:36:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 14:36:42,299 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 14:36:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:42,299 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 14:36:42,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 14:36:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:42,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:42,299 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:42,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,505 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1267892504, now seen corresponding path program 37 times [2021-06-05 14:36:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:42,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240731704] [2021-06-05 14:36:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:42,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240731704] [2021-06-05 14:36:42,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240731704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896595109] [2021-06-05 14:36:42,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896595109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:42,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:36:42,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919237047] [2021-06-05 14:36:42,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:36:42,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:36:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:36:42,595 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:42,669 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-06-05 14:36:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:42,669 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:36:42,669 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:36:42,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:36:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:36:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-06-05 14:36:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 14:36:42,671 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 14:36:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:42,671 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 14:36:42,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 14:36:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:36:42,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:42,671 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:42,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 14:36:42,872 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1061916403, now seen corresponding path program 38 times [2021-06-05 14:36:42,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:42,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299792883] [2021-06-05 14:36:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:42,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299792883] [2021-06-05 14:36:42,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299792883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309604335] [2021-06-05 14:36:42,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:36:42,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309604335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:42,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:36:42,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873408816] [2021-06-05 14:36:42,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:36:42,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:42,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:36:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:36:42,995 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:43,086 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-06-05 14:36:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:36:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:36:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:43,087 INFO L225 Difference]: With dead ends: 58 [2021-06-05 14:36:43,087 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 14:36:43,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 14:36:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 14:36:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 14:36:43,088 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 14:36:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:43,088 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 14:36:43,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 14:36:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:43,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:43,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:43,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:43,304 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:43,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1145172877, now seen corresponding path program 39 times [2021-06-05 14:36:43,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:43,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521889626] [2021-06-05 14:36:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:43,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:43,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521889626] [2021-06-05 14:36:43,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521889626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:43,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170724108] [2021-06-05 14:36:43,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:43,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:43,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:43,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:36:43,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:44,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:44,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:44,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:36:44,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:44,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:44,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:44,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:44,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:44,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:44,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,228 INFO L628 ElimStorePlain]: treesize reduction 91, result has 36.8 percent of original size [2021-06-05 14:36:44,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:44,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:44,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:36:44,250 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:222, output treesize:49 [2021-06-05 14:36:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170724108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:44,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:36:44,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143883512] [2021-06-05 14:36:44,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:36:44,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:44,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:36:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:36:44,325 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:44,855 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-06-05 14:36:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:44,856 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:36:44,856 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:36:44,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 706.9ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:36:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-06-05 14:36:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 129 transitions. [2021-06-05 14:36:44,858 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 129 transitions. Word has length 16 [2021-06-05 14:36:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:44,858 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 129 transitions. [2021-06-05 14:36:44,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 129 transitions. [2021-06-05 14:36:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:44,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:44,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:45,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 14:36:45,059 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash -914516767, now seen corresponding path program 40 times [2021-06-05 14:36:45,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:45,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661904948] [2021-06-05 14:36:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661904948] [2021-06-05 14:36:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661904948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413810801] [2021-06-05 14:36:45,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:45,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:45,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:36:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:45,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:45,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:36:45,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:45,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:45,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:45,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:45,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:45,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:45,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,973 INFO L628 ElimStorePlain]: treesize reduction 91, result has 36.8 percent of original size [2021-06-05 14:36:45,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:45,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:45,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:36:45,996 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:222, output treesize:49 [2021-06-05 14:36:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413810801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:46,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:36:46,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660643503] [2021-06-05 14:36:46,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:46,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:46,069 INFO L87 Difference]: Start difference. First operand 65 states and 129 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:46,329 INFO L93 Difference]: Finished difference Result 96 states and 188 transitions. [2021-06-05 14:36:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:46,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:46,329 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:36:46,329 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:36:46,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:36:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2021-06-05 14:36:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 134 transitions. [2021-06-05 14:36:46,331 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 134 transitions. Word has length 16 [2021-06-05 14:36:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:46,331 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 134 transitions. [2021-06-05 14:36:46,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 134 transitions. [2021-06-05 14:36:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:46,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:46,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:46,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:46,545 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1407527461, now seen corresponding path program 41 times [2021-06-05 14:36:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:46,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883550651] [2021-06-05 14:36:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:46,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883550651] [2021-06-05 14:36:46,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883550651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635625854] [2021-06-05 14:36:46,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:46,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:46,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:36:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:47,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:47,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:47,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:36:47,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:47,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:47,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:47,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:47,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:47,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:47,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:47,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:47,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:47,328 INFO L628 ElimStorePlain]: treesize reduction 104, result has 37.3 percent of original size [2021-06-05 14:36:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:47,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:47,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:47,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:47,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:47,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:47,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:47,375 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:47,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:47,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:47,393 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:36:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635625854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:47,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:47,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:36:47,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447212628] [2021-06-05 14:36:47,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:47,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:47,461 INFO L87 Difference]: Start difference. First operand 67 states and 134 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,780 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 14:36:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:47,886 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-05 14:36:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:47,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:47,887 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:36:47,887 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:36:47,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:36:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-06-05 14:36:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-06-05 14:36:47,888 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-06-05 14:36:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:47,888 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-06-05 14:36:47,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-06-05 14:36:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:47,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:47,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:48,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-05 14:36:48,093 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash 928242785, now seen corresponding path program 42 times [2021-06-05 14:36:48,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:48,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106863293] [2021-06-05 14:36:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:48,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:48,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106863293] [2021-06-05 14:36:48,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106863293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:48,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372425840] [2021-06-05 14:36:48,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:48,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:48,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:36:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:49,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:36:49,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:49,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:49,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:49,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:49,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:49,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,471 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 14:36:49,471 INFO L628 ElimStorePlain]: treesize reduction 557, result has 17.5 percent of original size [2021-06-05 14:36:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:49,476 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:49,523 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:49,568 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:49,616 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:49,658 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:49,698 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:49,737 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:36:49,772 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 10 variables, input treesize:901, output treesize:73 [2021-06-05 14:36:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372425840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:49,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:36:49,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480830496] [2021-06-05 14:36:49,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:49,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:49,925 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:50,333 INFO L93 Difference]: Finished difference Result 118 states and 217 transitions. [2021-06-05 14:36:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:50,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:50,334 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:36:50,334 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:36:50,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:36:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2021-06-05 14:36:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 69 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2021-06-05 14:36:50,335 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 16 [2021-06-05 14:36:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:50,335 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2021-06-05 14:36:50,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2021-06-05 14:36:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:50,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:50,336 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:50,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-05 14:36:50,549 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:50,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1995272783, now seen corresponding path program 43 times [2021-06-05 14:36:50,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:50,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773809052] [2021-06-05 14:36:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:50,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:50,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773809052] [2021-06-05 14:36:50,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773809052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:50,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278888883] [2021-06-05 14:36:50,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:36:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:50,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:50,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:50,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:50,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:50,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:50,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:50,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:50,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:50,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:50,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:50,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:50,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:50,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:50,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:50,966 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:36:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:51,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278888883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:51,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:51,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:36:51,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497716191] [2021-06-05 14:36:51,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:51,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:51,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:51,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:51,042 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:51,277 INFO L93 Difference]: Finished difference Result 98 states and 193 transitions. [2021-06-05 14:36:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:51,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:51,278 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:36:51,278 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:36:51,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:51,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:36:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-06-05 14:36:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 71 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 146 transitions. [2021-06-05 14:36:51,279 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 146 transitions. Word has length 16 [2021-06-05 14:36:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:51,279 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 146 transitions. [2021-06-05 14:36:51,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,280 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 146 transitions. [2021-06-05 14:36:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:51,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:51,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:51,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1607,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:51,489 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1515988107, now seen corresponding path program 44 times [2021-06-05 14:36:51,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:51,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241047106] [2021-06-05 14:36:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:51,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:51,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241047106] [2021-06-05 14:36:51,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241047106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:51,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338471789] [2021-06-05 14:36:51,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:51,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:51,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:36:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:51,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:51,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:51,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:51,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:51,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:51,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:51,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:51,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:51,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:51,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:51,949 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:51,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:51,952 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:52,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:52,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:52,004 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 14:36:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338471789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:52,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:36:52,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797342455] [2021-06-05 14:36:52,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:52,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:52,176 INFO L87 Difference]: Start difference. First operand 72 states and 146 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:52,711 INFO L93 Difference]: Finished difference Result 134 states and 255 transitions. [2021-06-05 14:36:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:52,712 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:36:52,712 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:36:52,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 699.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:36:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 74. [2021-06-05 14:36:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 152 transitions. [2021-06-05 14:36:52,713 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 152 transitions. Word has length 16 [2021-06-05 14:36:52,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:52,713 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 152 transitions. [2021-06-05 14:36:52,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 152 transitions. [2021-06-05 14:36:52,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:52,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:52,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:52,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,917 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 980758305, now seen corresponding path program 45 times [2021-06-05 14:36:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:52,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420896479] [2021-06-05 14:36:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:53,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:53,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420896479] [2021-06-05 14:36:53,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420896479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:53,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974717786] [2021-06-05 14:36:53,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:53,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:36:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:53,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:53,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:53,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:53,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:53,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:53,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:53,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:53,353 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:53,357 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:53,360 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:53,364 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:53,367 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:53,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:53,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:53,414 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:36:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:53,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974717786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:53,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:53,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:36:53,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330349444] [2021-06-05 14:36:53,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:53,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:53,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:53,576 INFO L87 Difference]: Start difference. First operand 74 states and 152 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:54,208 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-06-05 14:36:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:36:54,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:54,209 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:36:54,209 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:36:54,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:36:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:36:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2021-06-05 14:36:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 157 transitions. [2021-06-05 14:36:54,210 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 157 transitions. Word has length 16 [2021-06-05 14:36:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:54,210 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 157 transitions. [2021-06-05 14:36:54,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 157 transitions. [2021-06-05 14:36:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:54,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:54,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:54,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1658,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:54,417 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:54,417 INFO L82 PathProgramCache]: Analyzing trace with hash -8562829, now seen corresponding path program 46 times [2021-06-05 14:36:54,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:54,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071854601] [2021-06-05 14:36:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:54,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071854601] [2021-06-05 14:36:54,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071854601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830336696] [2021-06-05 14:36:54,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:54,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:54,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:54,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:36:54,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:55,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:55,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:36:55,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:55,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:55,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:55,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:55,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:55,369 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:55,373 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:55,378 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:55,382 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:36:55,387 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:55,392 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:36:55,397 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:36:55,402 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:36:55,407 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:55,410 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,515 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 14:36:55,516 INFO L628 ElimStorePlain]: treesize reduction 19, result has 88.5 percent of original size [2021-06-05 14:36:55,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:55,520 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:55,523 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:55,526 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:55,534 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:55,538 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:55,541 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:55,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:36:55,584 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 5 variables, input treesize:569, output treesize:86 [2021-06-05 14:36:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830336696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:55,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:36:55,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776871711] [2021-06-05 14:36:55,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:55,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:55,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:55,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:55,686 INFO L87 Difference]: Start difference. First operand 76 states and 157 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:55,926 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-06-05 14:36:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:55,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:55,927 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:36:55,927 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:36:55,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:36:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-05 14:36:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 14:36:55,929 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 14:36:55,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:55,929 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 14:36:55,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 14:36:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:55,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:55,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:56,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-06-05 14:36:56,130 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1981485897, now seen corresponding path program 47 times [2021-06-05 14:36:56,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:56,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103575529] [2021-06-05 14:36:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:56,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:56,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103575529] [2021-06-05 14:36:56,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103575529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:56,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692397379] [2021-06-05 14:36:56,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:56,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:56,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:56,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:36:56,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:57,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:36:57,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,043 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:36:57,052 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:57,057 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,062 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:36:57,068 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:57,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:57,077 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:36:57,082 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:57,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:57,086 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,138 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:36:57,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:57,142 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:57,145 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:57,148 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:57,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:57,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:57,170 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:36:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:57,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692397379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:57,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:57,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:36:57,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457103516] [2021-06-05 14:36:57,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:57,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:57,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:57,245 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,522 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 14:36:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:57,591 INFO L93 Difference]: Finished difference Result 115 states and 228 transitions. [2021-06-05 14:36:57,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:57,591 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:36:57,591 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:36:57,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:36:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 14:36:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 14:36:57,593 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 14:36:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:57,593 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 14:36:57,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 14:36:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:57,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:57,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:57,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 14:36:57,805 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1834196723, now seen corresponding path program 48 times [2021-06-05 14:36:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:57,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019505755] [2021-06-05 14:36:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:57,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019505755] [2021-06-05 14:36:57,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019505755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445962463] [2021-06-05 14:36:57,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:57,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:57,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:36:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:58,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:58,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:36:58,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:36:58,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,657 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:36:58,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:58,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,677 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:58,683 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,687 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,691 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,696 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,700 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:36:58,705 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:58,709 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:36:58,713 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,808 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:36:58,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:58,812 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:58,816 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:36:58,819 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:58,823 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:58,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:36:58,863 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:36:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445962463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:58,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:36:58,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266711474] [2021-06-05 14:36:58,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:58,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:58,988 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:59,350 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-05 14:36:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:36:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:59,351 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:36:59,351 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:36:59,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:36:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 81. [2021-06-05 14:36:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 14:36:59,352 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 14:36:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:59,353 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 14:36:59,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 14:36:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:36:59,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:59,353 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:59,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 14:36:59,553 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1393740575, now seen corresponding path program 49 times [2021-06-05 14:36:59,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:59,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142729133] [2021-06-05 14:36:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:59,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:59,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142729133] [2021-06-05 14:36:59,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142729133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:59,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135801294] [2021-06-05 14:36:59,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:36:59,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:59,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:59,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:59,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:59,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:59,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:59,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:59,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:59,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:36:59,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:59,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:36:59,967 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:59,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:36:59,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:59,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:59,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:59,991 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:37:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135801294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:00,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98450319] [2021-06-05 14:37:00,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:00,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:00,061 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:00,174 INFO L93 Difference]: Finished difference Result 98 states and 194 transitions. [2021-06-05 14:37:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:00,175 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:37:00,175 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:37:00,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:37:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-06-05 14:37:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.097560975609756) internal successors, (172), 82 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 172 transitions. [2021-06-05 14:37:00,176 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 172 transitions. Word has length 16 [2021-06-05 14:37:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:00,176 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 172 transitions. [2021-06-05 14:37:00,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 172 transitions. [2021-06-05 14:37:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:00,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:00,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:00,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2169 [2021-06-05 14:37:00,377 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1873025251, now seen corresponding path program 50 times [2021-06-05 14:37:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:00,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343084874] [2021-06-05 14:37:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:00,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343084874] [2021-06-05 14:37:00,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343084874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685016774] [2021-06-05 14:37:00,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:00,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:00,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:37:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:00,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:00,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:00,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:00,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:00,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:00,719 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:00,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,840 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 14:37:00,841 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-06-05 14:37:00,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:00,845 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:00,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:00,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:00,858 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:00,861 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:00,865 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,959 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:37:00,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:37:00,961 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:192, output treesize:109 [2021-06-05 14:37:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685016774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:01,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:01,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941001399] [2021-06-05 14:37:01,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:01,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:01,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:01,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:01,123 INFO L87 Difference]: Start difference. First operand 83 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:01,381 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-06-05 14:37:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:01,381 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:37:01,381 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:37:01,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:37:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2021-06-05 14:37:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.097560975609756) internal successors, (172), 82 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 172 transitions. [2021-06-05 14:37:01,383 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 172 transitions. Word has length 16 [2021-06-05 14:37:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:01,383 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 172 transitions. [2021-06-05 14:37:01,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 172 transitions. [2021-06-05 14:37:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:01,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:01,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:01,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:01,597 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1886712243, now seen corresponding path program 51 times [2021-06-05 14:37:01,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:01,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923866124] [2021-06-05 14:37:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:01,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923866124] [2021-06-05 14:37:01,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923866124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349994549] [2021-06-05 14:37:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:01,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:01,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:01,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:01,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:01,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:01,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:01,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:01,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:01,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:02,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:02,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:02,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:02,049 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:02,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:02,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:02,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:02,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:02,059 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:02,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:02,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:02,098 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:166, output treesize:79 [2021-06-05 14:37:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:02,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349994549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:02,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:02,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:02,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125951605] [2021-06-05 14:37:02,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:02,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:02,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:02,227 INFO L87 Difference]: Start difference. First operand 83 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:02,760 INFO L93 Difference]: Finished difference Result 141 states and 276 transitions. [2021-06-05 14:37:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:02,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:02,760 INFO L225 Difference]: With dead ends: 141 [2021-06-05 14:37:02,760 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:37:02,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 708.7ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:37:02,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2021-06-05 14:37:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.097560975609756) internal successors, (172), 82 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 172 transitions. [2021-06-05 14:37:02,762 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 172 transitions. Word has length 16 [2021-06-05 14:37:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:02,762 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 172 transitions. [2021-06-05 14:37:02,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 172 transitions. [2021-06-05 14:37:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:02,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:02,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:02,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2223 [2021-06-05 14:37:02,977 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash -353504777, now seen corresponding path program 52 times [2021-06-05 14:37:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:02,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596375573] [2021-06-05 14:37:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596375573] [2021-06-05 14:37:03,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596375573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659770523] [2021-06-05 14:37:03,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:37:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:03,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:03,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:03,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:03,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:03,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:03,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:03,380 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:03,384 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,479 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 14:37:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:03,482 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:03,486 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:03,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:03,492 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:03,495 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:03,502 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:03,577 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.0 percent of original size [2021-06-05 14:37:03,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:37:03,578 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:191, output treesize:83 [2021-06-05 14:37:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659770523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:03,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45245536] [2021-06-05 14:37:03,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:03,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:03,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:03,683 INFO L87 Difference]: Start difference. First operand 83 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,143 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-06-05 14:37:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:04,248 INFO L93 Difference]: Finished difference Result 115 states and 233 transitions. [2021-06-05 14:37:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:04,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:04,249 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:37:04,249 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:37:04,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 692.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:37:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-06-05 14:37:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 14:37:04,251 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 16 [2021-06-05 14:37:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:04,251 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 14:37:04,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 14:37:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:04,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:04,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:04,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:04,452 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:04,452 INFO L82 PathProgramCache]: Analyzing trace with hash -832789453, now seen corresponding path program 53 times [2021-06-05 14:37:04,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:04,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276762275] [2021-06-05 14:37:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:04,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276762275] [2021-06-05 14:37:04,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276762275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825859978] [2021-06-05 14:37:04,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:04,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:04,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:04,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:04,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:04,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:04,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:04,810 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:04,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:04,817 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:04,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:04,889 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:04,892 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:04,896 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:04,900 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:04,904 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:04,907 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:04,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:37:04,965 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-06-05 14:37:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825859978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:05,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:05,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515138011] [2021-06-05 14:37:05,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:05,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:05,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:05,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:05,125 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:05,419 INFO L93 Difference]: Finished difference Result 117 states and 234 transitions. [2021-06-05 14:37:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:05,419 INFO L225 Difference]: With dead ends: 117 [2021-06-05 14:37:05,419 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:37:05,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:37:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2021-06-05 14:37:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 14:37:05,421 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 16 [2021-06-05 14:37:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:05,421 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 14:37:05,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 14:37:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:05,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:05,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:05,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2284 [2021-06-05 14:37:05,637 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1368019255, now seen corresponding path program 54 times [2021-06-05 14:37:05,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:05,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447040491] [2021-06-05 14:37:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447040491] [2021-06-05 14:37:05,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447040491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856097807] [2021-06-05 14:37:05,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:05,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:06,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:06,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:06,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:06,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:06,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:06,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:06,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:06,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:06,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:06,090 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:06,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:06,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:06,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:37:06,144 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 14:37:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:06,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856097807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:06,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:06,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:06,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185092061] [2021-06-05 14:37:06,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:06,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:06,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:06,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:06,308 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:06,623 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-06-05 14:37:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:06,623 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:37:06,624 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:37:06,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:37:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-06-05 14:37:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 182 transitions. [2021-06-05 14:37:06,625 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 182 transitions. Word has length 16 [2021-06-05 14:37:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:06,625 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 182 transitions. [2021-06-05 14:37:06,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 182 transitions. [2021-06-05 14:37:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:06,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:06,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:06,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2314 [2021-06-05 14:37:06,840 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash -780273933, now seen corresponding path program 55 times [2021-06-05 14:37:06,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:06,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733391138] [2021-06-05 14:37:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:07,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733391138] [2021-06-05 14:37:07,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733391138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154607662] [2021-06-05 14:37:07,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:07,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:07,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:37:07,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:07,920 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:07,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,934 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:37:07,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:37:07,944 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,949 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:07,955 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,960 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,963 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,967 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:08,078 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 14:37:08,079 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:37:08,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:08,083 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:08,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:08,087 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:08,091 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:08,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:08,095 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:08,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:08,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:08,141 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:37:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:08,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154607662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:08,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:08,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571844276] [2021-06-05 14:37:08,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:08,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:08,288 INFO L87 Difference]: Start difference. First operand 87 states and 182 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:08,800 INFO L93 Difference]: Finished difference Result 125 states and 254 transitions. [2021-06-05 14:37:08,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:08,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:08,801 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:37:08,801 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:37:08,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 686.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:37:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2021-06-05 14:37:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 14:37:08,803 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 14:37:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:08,803 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 14:37:08,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 14:37:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:08,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:08,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:09,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-06-05 14:37:09,004 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:09,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1613147809, now seen corresponding path program 56 times [2021-06-05 14:37:09,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:09,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109394595] [2021-06-05 14:37:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:09,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109394595] [2021-06-05 14:37:09,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109394595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898643442] [2021-06-05 14:37:09,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:09,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:09,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:09,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:37:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:10,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:37:10,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:10,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,214 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:10,223 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:37:10,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,233 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,237 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,241 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:37:10,251 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:10,256 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,259 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:10,264 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:10,268 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:10,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:37:10,276 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,279 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:10,283 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,391 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 14:37:10,391 INFO L628 ElimStorePlain]: treesize reduction 17, result has 89.7 percent of original size [2021-06-05 14:37:10,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:10,395 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:10,399 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:10,402 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:10,406 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:10,409 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:10,412 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:10,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:10,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:37:10,460 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 5 variables, input treesize:704, output treesize:86 [2021-06-05 14:37:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:10,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898643442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:10,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:10,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:10,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580201897] [2021-06-05 14:37:10,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:10,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:10,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:10,557 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:10,796 INFO L93 Difference]: Finished difference Result 121 states and 247 transitions. [2021-06-05 14:37:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:10,797 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:37:10,797 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:37:10,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:37:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 91. [2021-06-05 14:37:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 191 transitions. [2021-06-05 14:37:10,799 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 191 transitions. Word has length 16 [2021-06-05 14:37:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:10,799 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 191 transitions. [2021-06-05 14:37:10,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 191 transitions. [2021-06-05 14:37:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:10,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:10,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:11,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2472,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:11,009 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash -359775259, now seen corresponding path program 57 times [2021-06-05 14:37:11,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:11,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400384766] [2021-06-05 14:37:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400384766] [2021-06-05 14:37:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400384766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911087811] [2021-06-05 14:37:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:11,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:11,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:37:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:12,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:12,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:12,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:37:12,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:37:12,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:12,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:12,043 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:12,047 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:12,051 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:12,055 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:12,059 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:12,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:37:12,068 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:37:12,073 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:12,077 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:12,082 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:12,085 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,192 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 14:37:12,192 INFO L628 ElimStorePlain]: treesize reduction 17, result has 89.7 percent of original size [2021-06-05 14:37:12,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:12,196 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:12,199 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:12,203 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:12,206 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:12,210 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:12,213 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:12,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:37:12,257 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 5 variables, input treesize:569, output treesize:86 [2021-06-05 14:37:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:12,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911087811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:12,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:12,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:12,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771516702] [2021-06-05 14:37:12,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:12,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:12,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:12,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:12,363 INFO L87 Difference]: Start difference. First operand 91 states and 191 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:13,128 INFO L93 Difference]: Finished difference Result 134 states and 271 transitions. [2021-06-05 14:37:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:13,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:13,129 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:37:13,129 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:37:13,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:37:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2021-06-05 14:37:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.131868131868132) internal successors, (194), 91 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 194 transitions. [2021-06-05 14:37:13,131 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 194 transitions. Word has length 16 [2021-06-05 14:37:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:13,131 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 194 transitions. [2021-06-05 14:37:13,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 194 transitions. [2021-06-05 14:37:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:13,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:13,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:13,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2642,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,332 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash -839059935, now seen corresponding path program 58 times [2021-06-05 14:37:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:13,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103423360] [2021-06-05 14:37:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:13,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103423360] [2021-06-05 14:37:13,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103423360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485535053] [2021-06-05 14:37:13,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:13,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:37:13,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:14,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:14,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:14,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:14,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:14,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:14,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:14,465 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:37:14,471 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:14,475 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:37:14,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:37:14,486 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:14,490 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:37:14,495 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:14,500 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:14,504 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:14,508 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:14,512 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,641 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 14:37:14,641 INFO L628 ElimStorePlain]: treesize reduction 17, result has 91.3 percent of original size [2021-06-05 14:37:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:14,645 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:14,649 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:14,653 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:14,657 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:14,660 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:14,664 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:14,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:37:14,718 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 5 variables, input treesize:649, output treesize:112 [2021-06-05 14:37:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:14,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485535053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:14,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:14,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:14,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208292568] [2021-06-05 14:37:14,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:14,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:14,895 INFO L87 Difference]: Start difference. First operand 92 states and 194 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:15,152 INFO L93 Difference]: Finished difference Result 124 states and 252 transitions. [2021-06-05 14:37:15,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:15,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:15,152 INFO L225 Difference]: With dead ends: 124 [2021-06-05 14:37:15,152 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:37:15,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:37:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2021-06-05 14:37:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 14:37:15,154 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 14:37:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:15,154 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 14:37:15,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 14:37:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:15,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:15,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:15,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2809 [2021-06-05 14:37:15,369 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash 227970063, now seen corresponding path program 59 times [2021-06-05 14:37:15,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:15,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083310647] [2021-06-05 14:37:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:15,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083310647] [2021-06-05 14:37:15,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083310647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382559051] [2021-06-05 14:37:15,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:15,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:15,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:15,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:15,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:15,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:15,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:15,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:15,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:15,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:15,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:15,786 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:15,788 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:15,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:15,809 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:109, output treesize:48 [2021-06-05 14:37:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382559051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:15,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802847411] [2021-06-05 14:37:15,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:15,877 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:16,039 INFO L93 Difference]: Finished difference Result 108 states and 216 transitions. [2021-06-05 14:37:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:16,040 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:37:16,040 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:37:16,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:37:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-06-05 14:37:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.10989010989011) internal successors, (192), 91 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 192 transitions. [2021-06-05 14:37:16,042 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 192 transitions. Word has length 16 [2021-06-05 14:37:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:16,042 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 192 transitions. [2021-06-05 14:37:16,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 192 transitions. [2021-06-05 14:37:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:16,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:16,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:16,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2976,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:16,257 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash -251314613, now seen corresponding path program 60 times [2021-06-05 14:37:16,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:16,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204352117] [2021-06-05 14:37:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:16,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204352117] [2021-06-05 14:37:16,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204352117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639744593] [2021-06-05 14:37:16,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:16,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:16,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:16,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:16,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:16,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:16,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:16,634 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:16,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:16,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:16,693 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:16,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:16,700 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:16,703 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:16,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:37:16,750 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:37:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639744593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:16,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:16,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961874136] [2021-06-05 14:37:16,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:16,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:16,908 INFO L87 Difference]: Start difference. First operand 92 states and 192 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:17,187 INFO L93 Difference]: Finished difference Result 119 states and 242 transitions. [2021-06-05 14:37:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:17,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:17,187 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:37:17,188 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:37:17,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:37:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-06-05 14:37:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 190 transitions. [2021-06-05 14:37:17,189 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 190 transitions. Word has length 16 [2021-06-05 14:37:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:17,189 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 190 transitions. [2021-06-05 14:37:17,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 190 transitions. [2021-06-05 14:37:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:17,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:17,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:17,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3007 [2021-06-05 14:37:17,397 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:17,397 INFO L82 PathProgramCache]: Analyzing trace with hash -786544415, now seen corresponding path program 61 times [2021-06-05 14:37:17,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:17,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599070595] [2021-06-05 14:37:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:17,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599070595] [2021-06-05 14:37:17,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599070595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270677976] [2021-06-05 14:37:17,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:17,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:17,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:17,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:17,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:17,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:17,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:17,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:17,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:17,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:17,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:17,880 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:17,883 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:17,887 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:17,890 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:17,893 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:17,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:37:17,942 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:232, output treesize:96 [2021-06-05 14:37:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:18,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270677976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:18,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:18,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:18,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892917763] [2021-06-05 14:37:18,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:18,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:18,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:18,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:18,106 INFO L87 Difference]: Start difference. First operand 91 states and 190 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:18,437 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-06-05 14:37:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:18,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:18,438 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:37:18,438 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:37:18,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:37:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2021-06-05 14:37:18,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 14:37:18,439 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-06-05 14:37:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:18,439 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 14:37:18,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 14:37:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:18,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:18,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:18,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3040,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:18,640 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1268205861, now seen corresponding path program 62 times [2021-06-05 14:37:18,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:18,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469877108] [2021-06-05 14:37:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:18,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469877108] [2021-06-05 14:37:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469877108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810326332] [2021-06-05 14:37:18,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:18,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:37:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:19,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:19,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:19,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:19,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,032 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,154 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:37:19,154 INFO L628 ElimStorePlain]: treesize reduction 30, result has 83.8 percent of original size [2021-06-05 14:37:19,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:19,158 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,162 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:19,165 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,169 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,172 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:19,175 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:19,178 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,266 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 14:37:19,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:37:19,268 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 3 variables, input treesize:256, output treesize:101 [2021-06-05 14:37:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:19,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810326332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:19,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:19,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:19,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414975406] [2021-06-05 14:37:19,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:19,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:19,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:19,369 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:19,807 INFO L93 Difference]: Finished difference Result 123 states and 253 transitions. [2021-06-05 14:37:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:19,808 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:37:19,808 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:37:19,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:37:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2021-06-05 14:37:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:37:19,810 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 16 [2021-06-05 14:37:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:19,810 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:37:19,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:37:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:19,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:19,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:20,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3083 [2021-06-05 14:37:20,017 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash 788921185, now seen corresponding path program 63 times [2021-06-05 14:37:20,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:20,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134248647] [2021-06-05 14:37:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:20,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:20,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134248647] [2021-06-05 14:37:20,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134248647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:20,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095497961] [2021-06-05 14:37:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:20,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:20,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:20,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:20,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:20,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:20,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:20,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:20,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:20,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:20,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:20,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:20,449 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:20,453 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:20,456 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:20,459 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:20,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:37:20,506 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:199, output treesize:100 [2021-06-05 14:37:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:20,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095497961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:20,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:20,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:20,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107820076] [2021-06-05 14:37:20,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:20,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:20,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:20,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:20,670 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:20,963 INFO L93 Difference]: Finished difference Result 129 states and 262 transitions. [2021-06-05 14:37:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:20,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:20,963 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:37:20,963 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:37:20,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:37:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-06-05 14:37:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 14:37:20,965 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 16 [2021-06-05 14:37:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:20,965 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 14:37:20,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 14:37:20,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:20,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:20,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:21,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3113,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:21,181 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash 253691383, now seen corresponding path program 64 times [2021-06-05 14:37:21,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:21,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099869340] [2021-06-05 14:37:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:21,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:21,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099869340] [2021-06-05 14:37:21,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099869340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893846121] [2021-06-05 14:37:21,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:21,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:21,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:21,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:21,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:21,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:21,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:21,521 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:21,524 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:21,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:21,599 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:21,603 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:21,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:21,610 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:21,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:21,617 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:21,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:37:21,680 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 14:37:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:21,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893846121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:21,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749174123] [2021-06-05 14:37:21,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:21,846 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:22,141 INFO L93 Difference]: Finished difference Result 129 states and 265 transitions. [2021-06-05 14:37:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:22,142 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:37:22,142 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:37:22,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:37:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2021-06-05 14:37:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-06-05 14:37:22,144 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-06-05 14:37:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:22,144 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-06-05 14:37:22,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-06-05 14:37:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:22,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:22,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:22,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3140 [2021-06-05 14:37:22,345 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash 841436705, now seen corresponding path program 65 times [2021-06-05 14:37:22,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:22,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382862642] [2021-06-05 14:37:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:22,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:22,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382862642] [2021-06-05 14:37:22,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382862642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:22,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442688575] [2021-06-05 14:37:22,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:22,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:22,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:23,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:37:23,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:23,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:37:23,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:23,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,223 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:23,228 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,232 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:37:23,242 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,246 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:23,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:23,251 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:23,255 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,348 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:37:23,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:23,352 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:23,356 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:23,360 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:23,363 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:23,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:23,407 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:37:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442688575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:23,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:23,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:37:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235873684] [2021-06-05 14:37:23,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:23,533 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:23,874 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-06-05 14:37:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:23,875 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:37:23,875 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:37:23,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:37:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-06-05 14:37:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 14:37:23,877 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-06-05 14:37:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:23,877 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 14:37:23,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 14:37:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:23,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:23,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:24,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3165 [2021-06-05 14:37:24,077 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1689194221, now seen corresponding path program 66 times [2021-06-05 14:37:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:24,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361158495] [2021-06-05 14:37:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:24,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361158495] [2021-06-05 14:37:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361158495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71519565] [2021-06-05 14:37:24,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:24,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:24,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:24,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:24,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:24,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:24,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:24,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:24,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:24,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:24,476 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:24,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:24,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:24,499 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:37:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:24,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71519565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:24,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:24,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:24,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451166144] [2021-06-05 14:37:24,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:24,566 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:24,808 INFO L93 Difference]: Finished difference Result 116 states and 232 transitions. [2021-06-05 14:37:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:24,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:24,808 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:37:24,808 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:37:24,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:37:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-06-05 14:37:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-06-05 14:37:24,810 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-06-05 14:37:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:24,810 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-06-05 14:37:24,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-06-05 14:37:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:24,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:24,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:25,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3239,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:25,025 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2126488399, now seen corresponding path program 67 times [2021-06-05 14:37:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:25,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029253107] [2021-06-05 14:37:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:25,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:25,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029253107] [2021-06-05 14:37:25,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029253107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:25,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789155163] [2021-06-05 14:37:25,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:25,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:25,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:25,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:37:25,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:25,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:37:25,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:25,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:25,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:25,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:25,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:25,990 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:25,993 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:25,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:25,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:37:26,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:26,008 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:26,012 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:26,015 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:26,020 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:26,024 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:26,027 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,113 INFO L628 ElimStorePlain]: treesize reduction 16, result has 86.8 percent of original size [2021-06-05 14:37:26,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:26,116 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:26,119 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:26,122 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:26,125 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:26,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:26,161 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 3 variables, input treesize:609, output treesize:73 [2021-06-05 14:37:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:26,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789155163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:26,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:26,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:26,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724892822] [2021-06-05 14:37:26,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:26,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:26,281 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:26,553 INFO L93 Difference]: Finished difference Result 143 states and 278 transitions. [2021-06-05 14:37:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:26,553 INFO L225 Difference]: With dead ends: 143 [2021-06-05 14:37:26,553 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 14:37:26,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 14:37:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2021-06-05 14:37:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 14:37:26,555 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-06-05 14:37:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:26,555 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 14:37:26,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 14:37:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:26,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:26,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:26,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:26,766 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:26,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1591258597, now seen corresponding path program 68 times [2021-06-05 14:37:26,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:26,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682967879] [2021-06-05 14:37:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:26,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:26,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682967879] [2021-06-05 14:37:26,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682967879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:26,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657958166] [2021-06-05 14:37:26,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:26,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:26,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:37:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:27,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:27,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:27,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:27,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:27,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:27,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:27,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:27,161 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:27,164 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:27,167 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,229 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 14:37:27,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:27,231 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:130, output treesize:73 [2021-06-05 14:37:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:27,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657958166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:27,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:27,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:27,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025576884] [2021-06-05 14:37:27,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:27,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:27,368 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:27,707 INFO L93 Difference]: Finished difference Result 118 states and 242 transitions. [2021-06-05 14:37:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:27,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:27,708 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:37:27,708 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:37:27,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:37:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-06-05 14:37:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-06-05 14:37:27,710 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 16 [2021-06-05 14:37:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:27,710 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-06-05 14:37:27,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-06-05 14:37:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:27,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:27,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:27,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:27,910 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:27,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2115963377, now seen corresponding path program 69 times [2021-06-05 14:37:27,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:27,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442402119] [2021-06-05 14:37:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:28,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:28,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442402119] [2021-06-05 14:37:28,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442402119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:28,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416063107] [2021-06-05 14:37:28,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:28,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:28,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:28,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:28,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:28,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:28,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:28,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:28,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:28,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:28,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:37:28,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:28,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,998 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-05 14:37:28,999 INFO L628 ElimStorePlain]: treesize reduction 474, result has 19.5 percent of original size [2021-06-05 14:37:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:29,015 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:29,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:37:29,105 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:29,147 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:29,189 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:29,229 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:29,266 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:29,302 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 14:37:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416063107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:29,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:29,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:29,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491420762] [2021-06-05 14:37:29,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:29,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:29,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:29,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:29,427 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:29,764 INFO L93 Difference]: Finished difference Result 134 states and 275 transitions. [2021-06-05 14:37:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:29,764 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:37:29,764 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:37:29,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:37:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-06-05 14:37:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-06-05 14:37:29,766 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 16 [2021-06-05 14:37:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:29,766 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-06-05 14:37:29,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-06-05 14:37:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:29,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:29,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:29,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:29,967 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:29,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1518626719, now seen corresponding path program 70 times [2021-06-05 14:37:29,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:29,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035790835] [2021-06-05 14:37:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035790835] [2021-06-05 14:37:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035790835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869197782] [2021-06-05 14:37:30,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:30,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:30,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:30,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:30,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:30,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:37:30,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:37:30,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,068 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-06-05 14:37:31,068 INFO L628 ElimStorePlain]: treesize reduction 371, result has 24.1 percent of original size [2021-06-05 14:37:31,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:31,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:37:31,118 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:31,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:31,208 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:31,248 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:31,288 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:31,326 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:31,361 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 14:37:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:31,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869197782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:31,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:31,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:37:31,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592225003] [2021-06-05 14:37:31,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:31,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:31,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:31,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:31,484 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,879 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 14:37:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,076 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-06-05 14:37:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:32,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,077 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:37:32,077 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:37:32,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 845.2ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:37:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2021-06-05 14:37:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 14:37:32,078 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 16 [2021-06-05 14:37:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,079 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 14:37:32,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 14:37:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:32,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,079 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3749 [2021-06-05 14:37:32,286 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash -894827320, now seen corresponding path program 71 times [2021-06-05 14:37:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116829653] [2021-06-05 14:37:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116829653] [2021-06-05 14:37:32,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116829653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713953542] [2021-06-05 14:37:32,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:32,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713953542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:32,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:37:32,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611543762] [2021-06-05 14:37:32,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:37:32,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:37:32,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:37:32,423 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,535 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-06-05 14:37:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,536 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:37:32,536 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 14:37:32,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 14:37:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2021-06-05 14:37:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.172043010752688) internal successors, (202), 93 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 202 transitions. [2021-06-05 14:37:32,537 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 202 transitions. Word has length 17 [2021-06-05 14:37:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,537 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 202 transitions. [2021-06-05 14:37:32,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 202 transitions. [2021-06-05 14:37:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:32,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,538 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3891 [2021-06-05 14:37:32,738 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1977338625, now seen corresponding path program 72 times [2021-06-05 14:37:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442343013] [2021-06-05 14:37:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442343013] [2021-06-05 14:37:32,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442343013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200171601] [2021-06-05 14:37:32,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:32,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200171601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:32,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:32,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658750965] [2021-06-05 14:37:32,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:32,948 INFO L87 Difference]: Start difference. First operand 94 states and 202 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,167 INFO L93 Difference]: Finished difference Result 137 states and 274 transitions. [2021-06-05 14:37:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,168 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:37:33,168 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:37:33,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:37:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-06-05 14:37:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.150537634408602) internal successors, (200), 93 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 200 transitions. [2021-06-05 14:37:33,169 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 200 transitions. Word has length 17 [2021-06-05 14:37:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,169 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 200 transitions. [2021-06-05 14:37:33,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 200 transitions. [2021-06-05 14:37:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:33,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,170 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:33,385 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,385 INFO L82 PathProgramCache]: Analyzing trace with hash -664171210, now seen corresponding path program 73 times [2021-06-05 14:37:33,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400644630] [2021-06-05 14:37:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:33,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400644630] [2021-06-05 14:37:33,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400644630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:33,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707277702] [2021-06-05 14:37:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:33,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707277702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:33,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:33,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:37:33,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926677347] [2021-06-05 14:37:33,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:37:33,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:37:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:37:33,529 INFO L87 Difference]: Start difference. First operand 94 states and 200 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,633 INFO L93 Difference]: Finished difference Result 130 states and 270 transitions. [2021-06-05 14:37:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:33,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,634 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:37:33,634 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:37:33,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:37:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-06-05 14:37:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1595744680851063) internal successors, (203), 94 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 203 transitions. [2021-06-05 14:37:33,635 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 203 transitions. Word has length 17 [2021-06-05 14:37:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,635 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 203 transitions. [2021-06-05 14:37:33,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 203 transitions. [2021-06-05 14:37:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:33,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,636 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3907,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:33,841 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -27920449, now seen corresponding path program 74 times [2021-06-05 14:37:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93263228] [2021-06-05 14:37:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:33,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93263228] [2021-06-05 14:37:33,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93263228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:33,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748087631] [2021-06-05 14:37:33,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:33,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:33,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:33,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:33,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748087631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:34,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:34,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283731119] [2021-06-05 14:37:34,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:34,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:34,092 INFO L87 Difference]: Start difference. First operand 95 states and 203 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:34,270 INFO L93 Difference]: Finished difference Result 133 states and 267 transitions. [2021-06-05 14:37:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:34,271 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:37:34,271 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 14:37:34,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 14:37:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2021-06-05 14:37:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.148936170212766) internal successors, (202), 94 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 202 transitions. [2021-06-05 14:37:34,272 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 202 transitions. Word has length 17 [2021-06-05 14:37:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:34,273 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 202 transitions. [2021-06-05 14:37:34,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 202 transitions. [2021-06-05 14:37:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:34,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:34,273 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:34,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-05 14:37:34,473 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2049348956, now seen corresponding path program 75 times [2021-06-05 14:37:34,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:34,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065653772] [2021-06-05 14:37:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065653772] [2021-06-05 14:37:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065653772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766185144] [2021-06-05 14:37:34,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:34,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:34,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766185144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:34,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:34,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828334495] [2021-06-05 14:37:34,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:34,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:34,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:34,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:34,643 INFO L87 Difference]: Start difference. First operand 95 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:34,739 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-06-05 14:37:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:34,740 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:37:34,740 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:37:34,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:37:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 96. [2021-06-05 14:37:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1578947368421053) internal successors, (205), 95 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 205 transitions. [2021-06-05 14:37:34,741 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 205 transitions. Word has length 17 [2021-06-05 14:37:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:34,741 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 205 transitions. [2021-06-05 14:37:34,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 205 transitions. [2021-06-05 14:37:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:34,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:34,742 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:34,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:34,945 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1058993413, now seen corresponding path program 76 times [2021-06-05 14:37:34,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:34,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463452736] [2021-06-05 14:37:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:34,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463452736] [2021-06-05 14:37:34,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463452736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847978525] [2021-06-05 14:37:34,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:35,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:35,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:35,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847978525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:35,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:35,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:35,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778595946] [2021-06-05 14:37:35,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:35,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:35,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:35,326 INFO L87 Difference]: Start difference. First operand 96 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:35,580 INFO L93 Difference]: Finished difference Result 137 states and 275 transitions. [2021-06-05 14:37:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:35,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:35,581 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:37:35,581 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:37:35,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:37:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-06-05 14:37:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1473684210526316) internal successors, (204), 95 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 204 transitions. [2021-06-05 14:37:35,582 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 204 transitions. Word has length 17 [2021-06-05 14:37:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:35,582 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 204 transitions. [2021-06-05 14:37:35,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 204 transitions. [2021-06-05 14:37:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:35,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:35,583 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:35,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3924,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:35,798 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1231103862, now seen corresponding path program 77 times [2021-06-05 14:37:35,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:35,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318149461] [2021-06-05 14:37:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:35,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:35,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318149461] [2021-06-05 14:37:35,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318149461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643565774] [2021-06-05 14:37:35,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:35,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:37:35,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:35,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:35,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:35,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643565774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:35,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:35,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:35,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613752812] [2021-06-05 14:37:35,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:35,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:35,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:35,972 INFO L87 Difference]: Start difference. First operand 96 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:36,120 INFO L93 Difference]: Finished difference Result 136 states and 274 transitions. [2021-06-05 14:37:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:36,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:36,121 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:37:36,121 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 14:37:36,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 14:37:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2021-06-05 14:37:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 208 transitions. [2021-06-05 14:37:36,122 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 208 transitions. Word has length 17 [2021-06-05 14:37:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:36,122 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 208 transitions. [2021-06-05 14:37:36,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 208 transitions. [2021-06-05 14:37:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:36,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:36,123 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:36,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-06-05 14:37:36,337 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1263050815, now seen corresponding path program 78 times [2021-06-05 14:37:36,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:36,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338530997] [2021-06-05 14:37:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:36,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:36,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338530997] [2021-06-05 14:37:36,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338530997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:36,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596729349] [2021-06-05 14:37:36,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:36,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:36,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:36,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:36,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:36,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,786 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 14:37:36,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:36,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:36,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:36,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:36,887 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:36,916 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:36,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:36,972 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:36,996 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:37:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596729349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:37,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:37,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980693814] [2021-06-05 14:37:37,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:37,026 INFO L87 Difference]: Start difference. First operand 97 states and 208 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:37,592 INFO L93 Difference]: Finished difference Result 156 states and 309 transitions. [2021-06-05 14:37:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:37:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:37,593 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:37:37,593 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 14:37:37,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 14:37:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 101. [2021-06-05 14:37:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.16) internal successors, (216), 100 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 216 transitions. [2021-06-05 14:37:37,595 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 216 transitions. Word has length 17 [2021-06-05 14:37:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:37,595 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 216 transitions. [2021-06-05 14:37:37,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 216 transitions. [2021-06-05 14:37:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:37,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:37,595 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:37,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3955,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:37,795 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:37,796 INFO L82 PathProgramCache]: Analyzing trace with hash 783766139, now seen corresponding path program 79 times [2021-06-05 14:37:37,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:37,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046017158] [2021-06-05 14:37:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:37,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:37,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046017158] [2021-06-05 14:37:37,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046017158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:37,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626508784] [2021-06-05 14:37:37,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:38,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:38,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:38,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,235 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:37:38,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:38,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:38,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:38,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:38,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:38,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:38,394 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:38,421 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:38,444 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:37:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:38,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626508784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:38,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:38,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:38,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775891050] [2021-06-05 14:37:38,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:38,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:38,472 INFO L87 Difference]: Start difference. First operand 101 states and 216 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:38,706 INFO L93 Difference]: Finished difference Result 137 states and 280 transitions. [2021-06-05 14:37:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:38,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:38,707 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:37:38,707 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 14:37:38,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 14:37:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2021-06-05 14:37:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.15625) internal successors, (207), 96 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 207 transitions. [2021-06-05 14:37:38,709 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 207 transitions. Word has length 17 [2021-06-05 14:37:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:38,709 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 207 transitions. [2021-06-05 14:37:38,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 207 transitions. [2021-06-05 14:37:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:38,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:38,709 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:38,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:38,921 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1191895354, now seen corresponding path program 80 times [2021-06-05 14:37:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:38,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668396439] [2021-06-05 14:37:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:38,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668396439] [2021-06-05 14:37:38,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668396439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558192682] [2021-06-05 14:37:38,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:39,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:39,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558192682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:39,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:39,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776943246] [2021-06-05 14:37:39,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:39,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:39,088 INFO L87 Difference]: Start difference. First operand 97 states and 207 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:39,219 INFO L93 Difference]: Finished difference Result 122 states and 251 transitions. [2021-06-05 14:37:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:39,220 INFO L225 Difference]: With dead ends: 122 [2021-06-05 14:37:39,220 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:37:39,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:37:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2021-06-05 14:37:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1458333333333335) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 206 transitions. [2021-06-05 14:37:39,222 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 206 transitions. Word has length 17 [2021-06-05 14:37:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:39,223 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 206 transitions. [2021-06-05 14:37:39,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 206 transitions. [2021-06-05 14:37:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:39,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:39,223 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:39,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3999,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,439 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 241782728, now seen corresponding path program 81 times [2021-06-05 14:37:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:39,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097807988] [2021-06-05 14:37:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:39,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097807988] [2021-06-05 14:37:39,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097807988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951614833] [2021-06-05 14:37:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:39,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951614833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:39,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:37:39,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717575901] [2021-06-05 14:37:39,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:37:39,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:39,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:37:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:37:39,582 INFO L87 Difference]: Start difference. First operand 97 states and 206 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:39,685 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-06-05 14:37:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:39,686 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:37:39,686 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:37:39,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:37:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-06-05 14:37:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1458333333333335) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 206 transitions. [2021-06-05 14:37:39,687 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 206 transitions. Word has length 17 [2021-06-05 14:37:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:39,687 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 206 transitions. [2021-06-05 14:37:39,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 206 transitions. [2021-06-05 14:37:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:39,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:39,688 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:39,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,901 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash 878033489, now seen corresponding path program 82 times [2021-06-05 14:37:39,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:39,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514257708] [2021-06-05 14:37:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514257708] [2021-06-05 14:37:39,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514257708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491768484] [2021-06-05 14:37:39,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:39,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:39,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:40,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491768484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:40,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:40,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818237585] [2021-06-05 14:37:40,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:40,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:40,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:40,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:40,146 INFO L87 Difference]: Start difference. First operand 97 states and 206 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:40,257 INFO L93 Difference]: Finished difference Result 111 states and 227 transitions. [2021-06-05 14:37:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:40,258 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:37:40,258 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:37:40,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:37:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-06-05 14:37:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 14:37:40,259 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 14:37:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:40,259 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 14:37:40,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 14:37:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:40,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:40,260 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:40,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-05 14:37:40,472 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1143395018, now seen corresponding path program 83 times [2021-06-05 14:37:40,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:40,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886322592] [2021-06-05 14:37:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:40,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:40,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886322592] [2021-06-05 14:37:40,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886322592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:40,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746704303] [2021-06-05 14:37:40,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:40,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:40,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:40,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746704303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:40,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:40,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:40,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949598870] [2021-06-05 14:37:40,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:40,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:40,628 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:40,729 INFO L93 Difference]: Finished difference Result 131 states and 272 transitions. [2021-06-05 14:37:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:40,730 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:37:40,730 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:37:40,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:37:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2021-06-05 14:37:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 14:37:40,731 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 14:37:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:40,731 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 14:37:40,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 14:37:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:40,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:40,731 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:40,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 14:37:40,937 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -459189108, now seen corresponding path program 84 times [2021-06-05 14:37:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:40,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227390408] [2021-06-05 14:37:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:41,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227390408] [2021-06-05 14:37:41,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227390408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920069023] [2021-06-05 14:37:41,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:41,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:37:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920069023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:41,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:41,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7337339] [2021-06-05 14:37:41,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:41,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:41,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:41,115 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:41,212 INFO L93 Difference]: Finished difference Result 129 states and 269 transitions. [2021-06-05 14:37:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:41,213 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:37:41,213 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:37:41,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:37:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2021-06-05 14:37:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.13265306122449) internal successors, (209), 98 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 209 transitions. [2021-06-05 14:37:41,214 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 209 transitions. Word has length 17 [2021-06-05 14:37:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:41,214 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 209 transitions. [2021-06-05 14:37:41,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 209 transitions. [2021-06-05 14:37:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:41,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:41,215 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:41,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4028 [2021-06-05 14:37:41,415 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1689720077, now seen corresponding path program 85 times [2021-06-05 14:37:41,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:41,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502499874] [2021-06-05 14:37:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:41,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502499874] [2021-06-05 14:37:41,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502499874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214113186] [2021-06-05 14:37:41,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:41,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:41,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:41,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,742 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 14:37:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:41,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:41,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:41,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:41,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:41,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:41,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:41,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:41,831 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 14:37:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214113186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:41,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:41,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491885944] [2021-06-05 14:37:41,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:41,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:41,859 INFO L87 Difference]: Start difference. First operand 99 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:42,123 INFO L93 Difference]: Finished difference Result 136 states and 273 transitions. [2021-06-05 14:37:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:42,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:42,124 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:37:42,124 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 14:37:42,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 14:37:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2021-06-05 14:37:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 14:37:42,126 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 14:37:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:42,126 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 14:37:42,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 14:37:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:42,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:42,126 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:42,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:42,341 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -103159220, now seen corresponding path program 86 times [2021-06-05 14:37:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686780681] [2021-06-05 14:37:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686780681] [2021-06-05 14:37:42,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686780681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620180899] [2021-06-05 14:37:42,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:42,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:42,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:42,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620180899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:42,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:42,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505993269] [2021-06-05 14:37:42,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:42,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:42,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:42,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:42,630 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:42,775 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-06-05 14:37:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:42,775 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:37:42,776 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:37:42,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:37:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-06-05 14:37:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 14:37:42,777 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 14:37:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:42,777 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 14:37:42,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 14:37:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:42,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:42,777 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:42,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:42,989 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:42,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1117673698, now seen corresponding path program 87 times [2021-06-05 14:37:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:42,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825958192] [2021-06-05 14:37:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:43,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825958192] [2021-06-05 14:37:43,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825958192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041511550] [2021-06-05 14:37:43,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:43,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:43,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:43,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:43,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041511550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:43,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:43,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305640336] [2021-06-05 14:37:43,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:43,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:43,268 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:43,482 INFO L93 Difference]: Finished difference Result 155 states and 312 transitions. [2021-06-05 14:37:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:37:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:43,482 INFO L225 Difference]: With dead ends: 155 [2021-06-05 14:37:43,482 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:37:43,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:37:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 99. [2021-06-05 14:37:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1530612244897958) internal successors, (211), 98 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 211 transitions. [2021-06-05 14:37:43,484 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 211 transitions. Word has length 17 [2021-06-05 14:37:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:43,484 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 211 transitions. [2021-06-05 14:37:43,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 211 transitions. [2021-06-05 14:37:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:43,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:43,484 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:43,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-05 14:37:43,701 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash -529928376, now seen corresponding path program 88 times [2021-06-05 14:37:43,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:43,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947409859] [2021-06-05 14:37:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947409859] [2021-06-05 14:37:43,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947409859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905875518] [2021-06-05 14:37:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:43,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:43,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905875518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:43,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:43,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741832431] [2021-06-05 14:37:43,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:43,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:43,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:43,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:43,974 INFO L87 Difference]: Start difference. First operand 99 states and 211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:44,089 INFO L93 Difference]: Finished difference Result 134 states and 272 transitions. [2021-06-05 14:37:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:44,090 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:37:44,090 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 14:37:44,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 14:37:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2021-06-05 14:37:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1530612244897958) internal successors, (211), 98 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 211 transitions. [2021-06-05 14:37:44,096 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 211 transitions. Word has length 17 [2021-06-05 14:37:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:44,096 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 211 transitions. [2021-06-05 14:37:44,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 211 transitions. [2021-06-05 14:37:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:44,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:44,096 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:44,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4129,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:44,306 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash 721454289, now seen corresponding path program 89 times [2021-06-05 14:37:44,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:44,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529290879] [2021-06-05 14:37:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:44,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529290879] [2021-06-05 14:37:44,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529290879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232383362] [2021-06-05 14:37:44,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:44,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:37:44,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:44,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:44,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:44,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:44,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:44,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,612 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:37:44,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:44,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,637 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:37:44,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:44,638 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:37:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:44,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232383362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:44,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:44,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:44,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484640096] [2021-06-05 14:37:44,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:44,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:44,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:44,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:44,658 INFO L87 Difference]: Start difference. First operand 99 states and 211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:44,825 INFO L93 Difference]: Finished difference Result 162 states and 326 transitions. [2021-06-05 14:37:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:44,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:44,826 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:37:44,826 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 14:37:44,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 14:37:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2021-06-05 14:37:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1818181818181817) internal successors, (216), 99 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 216 transitions. [2021-06-05 14:37:44,828 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 216 transitions. Word has length 17 [2021-06-05 14:37:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:44,828 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 216 transitions. [2021-06-05 14:37:44,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 216 transitions. [2021-06-05 14:37:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:44,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:44,828 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:45,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-05 14:37:45,029 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1512495901, now seen corresponding path program 90 times [2021-06-05 14:37:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:45,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583843075] [2021-06-05 14:37:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:45,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583843075] [2021-06-05 14:37:45,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583843075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896297482] [2021-06-05 14:37:45,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:45,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:45,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:45,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:45,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:45,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:45,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,279 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:37:45,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:45,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:45,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,290 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:37:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896297482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398963605] [2021-06-05 14:37:45,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:45,296 INFO L87 Difference]: Start difference. First operand 100 states and 216 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:45,438 INFO L93 Difference]: Finished difference Result 127 states and 265 transitions. [2021-06-05 14:37:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:45,439 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:37:45,439 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:37:45,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:37:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-06-05 14:37:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 14:37:45,440 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 14:37:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:45,440 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 14:37:45,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 14:37:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:45,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:45,440 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:45,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4218,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,645 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:45,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:45,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1877216436, now seen corresponding path program 91 times [2021-06-05 14:37:45,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:45,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576590578] [2021-06-05 14:37:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:45,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576590578] [2021-06-05 14:37:45,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576590578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001200491] [2021-06-05 14:37:45,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:45,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001200491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:45,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:45,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919157539] [2021-06-05 14:37:45,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:45,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:45,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:45,864 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:45,984 INFO L93 Difference]: Finished difference Result 114 states and 237 transitions. [2021-06-05 14:37:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:45,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:45,984 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:37:45,984 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:37:45,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:37:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2021-06-05 14:37:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-06-05 14:37:45,986 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-06-05 14:37:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:45,986 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-06-05 14:37:45,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-06-05 14:37:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:45,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:45,986 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:46,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-05 14:37:46,187 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1738416266, now seen corresponding path program 92 times [2021-06-05 14:37:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:46,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504680510] [2021-06-05 14:37:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:46,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:46,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504680510] [2021-06-05 14:37:46,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504680510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:46,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032151012] [2021-06-05 14:37:46,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:46,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:46,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:46,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:46,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032151012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:46,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:46,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:46,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392683277] [2021-06-05 14:37:46,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:46,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:46,421 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:46,569 INFO L93 Difference]: Finished difference Result 120 states and 251 transitions. [2021-06-05 14:37:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:46,569 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:37:46,570 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:37:46,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:37:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2021-06-05 14:37:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-06-05 14:37:46,571 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-06-05 14:37:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:46,571 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-06-05 14:37:46,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,571 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-06-05 14:37:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:46,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:46,571 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:46,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4274 [2021-06-05 14:37:46,787 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:46,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1102165505, now seen corresponding path program 93 times [2021-06-05 14:37:46,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:46,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790196867] [2021-06-05 14:37:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:46,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:46,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790196867] [2021-06-05 14:37:46,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790196867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:46,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979157987] [2021-06-05 14:37:46,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:46,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:46,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:46,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:46,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979157987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:47,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563798154] [2021-06-05 14:37:47,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:47,082 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:47,230 INFO L93 Difference]: Finished difference Result 115 states and 235 transitions. [2021-06-05 14:37:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:47,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:47,230 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:37:47,231 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:37:47,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:37:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2021-06-05 14:37:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 14:37:47,232 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 14:37:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:47,232 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 14:37:47,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 14:37:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:47,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:47,232 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:47,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4292 [2021-06-05 14:37:47,433 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1171373284, now seen corresponding path program 94 times [2021-06-05 14:37:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886324120] [2021-06-05 14:37:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:47,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886324120] [2021-06-05 14:37:47,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886324120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630788726] [2021-06-05 14:37:47,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:47,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630788726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:47,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:47,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168330702] [2021-06-05 14:37:47,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:47,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:47,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:47,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:47,718 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:47,910 INFO L93 Difference]: Finished difference Result 129 states and 269 transitions. [2021-06-05 14:37:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:47,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:47,911 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:37:47,911 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:37:47,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:37:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2021-06-05 14:37:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 14:37:47,912 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 14:37:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:47,912 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 14:37:47,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 14:37:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:47,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:47,913 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:48,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4315,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,120 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash 156858806, now seen corresponding path program 95 times [2021-06-05 14:37:48,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:48,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055521200] [2021-06-05 14:37:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:48,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055521200] [2021-06-05 14:37:48,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055521200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889348615] [2021-06-05 14:37:48,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:37:48,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:48,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889348615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:48,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:48,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004404752] [2021-06-05 14:37:48,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:48,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:48,491 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:48,708 INFO L93 Difference]: Finished difference Result 129 states and 269 transitions. [2021-06-05 14:37:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:48,709 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:37:48,709 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:37:48,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:37:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2021-06-05 14:37:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 201 transitions. [2021-06-05 14:37:48,710 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 201 transitions. Word has length 17 [2021-06-05 14:37:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:48,710 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 201 transitions. [2021-06-05 14:37:48,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 201 transitions. [2021-06-05 14:37:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:48,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:48,710 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:48,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4344,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,921 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1229041557, now seen corresponding path program 96 times [2021-06-05 14:37:48,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:48,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220028152] [2021-06-05 14:37:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220028152] [2021-06-05 14:37:48,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220028152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729746959] [2021-06-05 14:37:48,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:49,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:49,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:49,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:49,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:49,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,235 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 14:37:49,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:49,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:49,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:49,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:49,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:49,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:49,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:49,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:49,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:49,324 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 14:37:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729746959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:49,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074921007] [2021-06-05 14:37:49,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:49,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:49,353 INFO L87 Difference]: Start difference. First operand 95 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:49,549 INFO L93 Difference]: Finished difference Result 129 states and 258 transitions. [2021-06-05 14:37:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:49,549 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:37:49,550 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:37:49,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:37:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2021-06-05 14:37:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.13265306122449) internal successors, (209), 98 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 209 transitions. [2021-06-05 14:37:49,551 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 209 transitions. Word has length 17 [2021-06-05 14:37:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:49,551 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 209 transitions. [2021-06-05 14:37:49,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 209 transitions. [2021-06-05 14:37:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:49,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:49,551 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:49,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4398 [2021-06-05 14:37:49,765 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash 749756881, now seen corresponding path program 97 times [2021-06-05 14:37:49,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:49,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256666903] [2021-06-05 14:37:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:49,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:49,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256666903] [2021-06-05 14:37:49,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256666903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354683765] [2021-06-05 14:37:49,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:49,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:50,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:50,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:50,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:50,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,101 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:37:50,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:50,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:50,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:50,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:50,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:50,232 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:50,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:50,286 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:50,311 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:37:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:50,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354683765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:50,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:50,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:50,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166691103] [2021-06-05 14:37:50,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:50,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:50,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:50,339 INFO L87 Difference]: Start difference. First operand 99 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:50,452 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2021-06-05 14:37:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:50,453 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:37:50,453 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:37:50,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:37:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-06-05 14:37:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-06-05 14:37:50,454 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-06-05 14:37:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:50,454 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-06-05 14:37:50,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-06-05 14:37:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:50,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:50,455 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:50,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4418,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:50,669 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1225904612, now seen corresponding path program 98 times [2021-06-05 14:37:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:50,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900790793] [2021-06-05 14:37:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:50,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:50,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900790793] [2021-06-05 14:37:50,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900790793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:50,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261450557] [2021-06-05 14:37:50,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:50,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:50,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:50,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261450557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:50,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:50,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:50,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359155576] [2021-06-05 14:37:50,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:50,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:50,958 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:51,142 INFO L93 Difference]: Finished difference Result 125 states and 256 transitions. [2021-06-05 14:37:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:51,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:51,143 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:37:51,143 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:37:51,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:37:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2021-06-05 14:37:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-06-05 14:37:51,144 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 17 [2021-06-05 14:37:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:51,144 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-06-05 14:37:51,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-06-05 14:37:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:51,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:51,144 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:51,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4438,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,357 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash 99180452, now seen corresponding path program 99 times [2021-06-05 14:37:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:51,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449783882] [2021-06-05 14:37:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:51,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449783882] [2021-06-05 14:37:51,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449783882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133101763] [2021-06-05 14:37:51,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:37:51,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133101763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:51,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:51,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197416352] [2021-06-05 14:37:51,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:51,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:51,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:51,615 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:51,738 INFO L93 Difference]: Finished difference Result 120 states and 249 transitions. [2021-06-05 14:37:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:51,738 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:37:51,738 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:37:51,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:37:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 14:37:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:37:51,739 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:37:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:51,740 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:37:51,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:37:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:51,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:51,740 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:51,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4478 [2021-06-05 14:37:51,940 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:51,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1089535995, now seen corresponding path program 100 times [2021-06-05 14:37:51,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:51,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463997602] [2021-06-05 14:37:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:51,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463997602] [2021-06-05 14:37:51,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463997602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905709207] [2021-06-05 14:37:51,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:52,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:52,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:52,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:52,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:52,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905709207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:52,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:52,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28194758] [2021-06-05 14:37:52,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:52,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:52,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:52,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:52,238 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:52,412 INFO L93 Difference]: Finished difference Result 110 states and 224 transitions. [2021-06-05 14:37:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:52,412 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:37:52,412 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:37:52,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:37:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-06-05 14:37:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 14:37:52,413 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 14:37:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:52,413 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 14:37:52,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 14:37:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:52,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:52,414 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:52,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4508 [2021-06-05 14:37:52,614 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash -915334026, now seen corresponding path program 101 times [2021-06-05 14:37:52,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:52,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763531405] [2021-06-05 14:37:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:52,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763531405] [2021-06-05 14:37:52,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763531405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746992070] [2021-06-05 14:37:52,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:52,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:37:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:52,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746992070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:52,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:52,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855335779] [2021-06-05 14:37:52,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:52,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:52,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:52,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:52,900 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:53,003 INFO L93 Difference]: Finished difference Result 131 states and 271 transitions. [2021-06-05 14:37:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:53,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:53,003 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:37:53,003 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:37:53,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:37:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 97. [2021-06-05 14:37:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 96 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 203 transitions. [2021-06-05 14:37:53,005 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 203 transitions. Word has length 17 [2021-06-05 14:37:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:53,005 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 203 transitions. [2021-06-05 14:37:53,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 203 transitions. [2021-06-05 14:37:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:53,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:53,005 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:53,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4535 [2021-06-05 14:37:53,217 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1362671749, now seen corresponding path program 102 times [2021-06-05 14:37:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:53,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435706696] [2021-06-05 14:37:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:53,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435706696] [2021-06-05 14:37:53,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435706696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998154975] [2021-06-05 14:37:53,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:53,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:37:53,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:53,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:53,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:53,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:53,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:53,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,566 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:37:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:53,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:53,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:53,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:53,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:53,635 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:53,665 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:53,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:53,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:53,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:53,723 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:53,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:53,749 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:53,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:53,773 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:37:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:53,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998154975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:53,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:53,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669933831] [2021-06-05 14:37:53,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:53,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:53,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:53,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:53,800 INFO L87 Difference]: Start difference. First operand 97 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:53,897 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2021-06-05 14:37:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:53,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:53,898 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:37:53,898 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:37:53,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:37:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-06-05 14:37:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 14:37:53,899 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 14:37:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:53,899 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 14:37:53,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 14:37:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:53,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:53,899 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:54,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4570,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:54,105 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash -327588704, now seen corresponding path program 103 times [2021-06-05 14:37:54,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:54,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178942443] [2021-06-05 14:37:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:54,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:54,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178942443] [2021-06-05 14:37:54,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178942443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278875810] [2021-06-05 14:37:54,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:54,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:54,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278875810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:54,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:54,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378278930] [2021-06-05 14:37:54,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:54,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:54,382 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:54,518 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-06-05 14:37:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:54,519 INFO L225 Difference]: With dead ends: 124 [2021-06-05 14:37:54,519 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 14:37:54,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 14:37:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2021-06-05 14:37:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:37:54,520 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:37:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:54,520 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:37:54,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:37:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:54,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:54,521 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:54,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-06-05 14:37:54,736 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash -774926427, now seen corresponding path program 104 times [2021-06-05 14:37:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:54,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970145892] [2021-06-05 14:37:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:54,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970145892] [2021-06-05 14:37:54,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970145892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476994259] [2021-06-05 14:37:54,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:54,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:54,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:54,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:54,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:54,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:54,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:54,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:54,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:54,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:54,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:54,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:54,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:54,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:54,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:54,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:54,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:54,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,025 INFO L628 ElimStorePlain]: treesize reduction 21, result has 61.1 percent of original size [2021-06-05 14:37:55,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:55,028 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,051 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:37:55,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:55,051 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-06-05 14:37:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:55,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476994259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:55,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:55,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:55,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832755182] [2021-06-05 14:37:55,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:55,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:55,072 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:55,260 INFO L93 Difference]: Finished difference Result 150 states and 300 transitions. [2021-06-05 14:37:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:55,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:55,261 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:37:55,261 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:37:55,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:37:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2021-06-05 14:37:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 14:37:55,262 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 14:37:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:55,262 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 14:37:55,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 14:37:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:55,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:55,263 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:55,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4621 [2021-06-05 14:37:55,477 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:55,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1310156229, now seen corresponding path program 105 times [2021-06-05 14:37:55,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:55,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508294915] [2021-06-05 14:37:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:55,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508294915] [2021-06-05 14:37:55,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508294915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102761822] [2021-06-05 14:37:55,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:55,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:37:55,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:55,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:55,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:55,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:55,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:55,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:55,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:55,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:55,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,726 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:37:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:55,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:55,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:37:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:55,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102761822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:55,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:55,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:55,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652512060] [2021-06-05 14:37:55,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:55,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:55,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:55,739 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:55,855 INFO L93 Difference]: Finished difference Result 119 states and 247 transitions. [2021-06-05 14:37:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:55,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:55,855 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:37:55,855 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:37:55,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:37:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2021-06-05 14:37:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:37:55,857 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:37:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:55,857 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:37:55,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:37:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:55,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:55,857 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:56,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4653,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:56,073 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:56,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1674876764, now seen corresponding path program 106 times [2021-06-05 14:37:56,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:56,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014704023] [2021-06-05 14:37:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014704023] [2021-06-05 14:37:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014704023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512899664] [2021-06-05 14:37:56,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:56,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:56,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512899664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:56,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:56,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105535028] [2021-06-05 14:37:56,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:56,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:56,321 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:56,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:56,450 INFO L93 Difference]: Finished difference Result 108 states and 222 transitions. [2021-06-05 14:37:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:56,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:56,451 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:37:56,451 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:37:56,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:37:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-06-05 14:37:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-06-05 14:37:56,452 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 17 [2021-06-05 14:37:56,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:56,452 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-06-05 14:37:56,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-06-05 14:37:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:56,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:56,452 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:56,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4676,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:56,668 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:56,668 INFO L82 PathProgramCache]: Analyzing trace with hash 712647094, now seen corresponding path program 107 times [2021-06-05 14:37:56,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:56,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85126702] [2021-06-05 14:37:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:56,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85126702] [2021-06-05 14:37:56,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85126702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382362652] [2021-06-05 14:37:56,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:56,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:37:56,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382362652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:56,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:56,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246578977] [2021-06-05 14:37:56,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:56,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:56,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:56,983 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:57,176 INFO L93 Difference]: Finished difference Result 131 states and 261 transitions. [2021-06-05 14:37:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:57,177 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:37:57,177 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:37:57,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:37:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 97. [2021-06-05 14:37:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 14:37:57,178 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 14:37:57,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:57,178 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 14:37:57,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 14:37:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:57,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:57,178 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:57,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4693 [2021-06-05 14:37:57,385 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash 265309371, now seen corresponding path program 108 times [2021-06-05 14:37:57,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:57,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695324557] [2021-06-05 14:37:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:57,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:57,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695324557] [2021-06-05 14:37:57,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695324557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:57,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136430595] [2021-06-05 14:37:57,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:57,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:37:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:57,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:57,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:57,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:57,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:57,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:57,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:57,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:37:57,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,703 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:37:57,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:57,706 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,729 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:37:57,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:57,729 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:37:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:57,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136430595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:57,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:57,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:57,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023358742] [2021-06-05 14:37:57,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:57,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:57,750 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:58,013 INFO L93 Difference]: Finished difference Result 150 states and 299 transitions. [2021-06-05 14:37:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:58,013 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:37:58,013 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:37:58,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:37:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2021-06-05 14:37:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-06-05 14:37:58,015 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-06-05 14:37:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:58,015 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-06-05 14:37:58,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-06-05 14:37:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:58,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:58,015 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:58,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4729,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:58,229 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash -269920431, now seen corresponding path program 109 times [2021-06-05 14:37:58,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:58,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152244200] [2021-06-05 14:37:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152244200] [2021-06-05 14:37:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152244200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898704259] [2021-06-05 14:37:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:58,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:58,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:58,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:58,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:58,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:58,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,476 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:37:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:58,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:58,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,483 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:37:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898704259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:58,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:58,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448832355] [2021-06-05 14:37:58,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:58,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:58,489 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:58,646 INFO L93 Difference]: Finished difference Result 119 states and 249 transitions. [2021-06-05 14:37:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:58,647 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:37:58,647 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:37:58,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:37:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-06-05 14:37:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-06-05 14:37:58,648 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-06-05 14:37:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:58,648 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-06-05 14:37:58,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-06-05 14:37:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:58,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:58,648 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:58,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4778 [2021-06-05 14:37:58,849 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:58,849 INFO L82 PathProgramCache]: Analyzing trace with hash -634640966, now seen corresponding path program 110 times [2021-06-05 14:37:58,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:58,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141283956] [2021-06-05 14:37:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141283956] [2021-06-05 14:37:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141283956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552764129] [2021-06-05 14:37:58,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:58,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:58,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:59,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552764129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:59,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:59,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:59,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119171576] [2021-06-05 14:37:59,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:59,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:59,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:59,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:59,078 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:59,272 INFO L93 Difference]: Finished difference Result 120 states and 249 transitions. [2021-06-05 14:37:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:59,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:59,272 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:37:59,272 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:37:59,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:37:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-06-05 14:37:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 210 transitions. [2021-06-05 14:37:59,273 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 210 transitions. Word has length 17 [2021-06-05 14:37:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:59,273 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 210 transitions. [2021-06-05 14:37:59,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 210 transitions. [2021-06-05 14:37:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:59,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:59,274 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:59,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4800,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:59,477 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 317824891, now seen corresponding path program 111 times [2021-06-05 14:37:59,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:59,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981138045] [2021-06-05 14:37:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:59,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981138045] [2021-06-05 14:37:59,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981138045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:59,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462182247] [2021-06-05 14:37:59,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:59,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:59,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:37:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:59,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:59,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:59,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:37:59,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:59,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:59,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:37:59,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:59,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,739 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:37:59,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:37:59,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:59,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,747 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 14:37:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:59,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462182247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:59,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:59,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:59,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347341715] [2021-06-05 14:37:59,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:59,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:59,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:59,753 INFO L87 Difference]: Start difference. First operand 98 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:59,871 INFO L93 Difference]: Finished difference Result 115 states and 239 transitions. [2021-06-05 14:37:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:37:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:59,872 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:37:59,872 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:37:59,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:37:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-06-05 14:37:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 203 transitions. [2021-06-05 14:37:59,873 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 203 transitions. Word has length 17 [2021-06-05 14:37:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:59,873 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 203 transitions. [2021-06-05 14:37:59,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 203 transitions. [2021-06-05 14:37:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:37:59,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:59,873 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:00,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4820 [2021-06-05 14:38:00,074 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1647333498, now seen corresponding path program 112 times [2021-06-05 14:38:00,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:00,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831544398] [2021-06-05 14:38:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:00,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831544398] [2021-06-05 14:38:00,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831544398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395771956] [2021-06-05 14:38:00,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:00,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395771956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:00,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:00,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561610658] [2021-06-05 14:38:00,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:00,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:00,291 INFO L87 Difference]: Start difference. First operand 96 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:00,412 INFO L93 Difference]: Finished difference Result 110 states and 226 transitions. [2021-06-05 14:38:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:00,412 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:38:00,413 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:38:00,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:38:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-06-05 14:38:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:38:00,414 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:38:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:00,414 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:38:00,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:38:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:00,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:00,414 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:00,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4839 [2021-06-05 14:38:00,614 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:00,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1289973256, now seen corresponding path program 113 times [2021-06-05 14:38:00,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:00,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967971260] [2021-06-05 14:38:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:00,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967971260] [2021-06-05 14:38:00,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967971260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890477073] [2021-06-05 14:38:00,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:00,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:00,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:00,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:00,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:00,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:00,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:00,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:00,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:00,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:00,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:00,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:00,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:00,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:00,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:00,870 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:38:00,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:00,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:00,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:00,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:38:00,877 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:38:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890477073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:00,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:00,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053764310] [2021-06-05 14:38:00,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:00,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:00,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:00,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:00,882 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:00,996 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2021-06-05 14:38:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:00,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:00,997 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:38:00,997 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:38:00,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:38:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2021-06-05 14:38:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:38:00,998 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:38:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:00,998 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:38:00,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:38:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:00,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:00,998 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:01,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4856,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:01,198 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:01,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1926224017, now seen corresponding path program 114 times [2021-06-05 14:38:01,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:01,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953214334] [2021-06-05 14:38:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:01,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953214334] [2021-06-05 14:38:01,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953214334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243560701] [2021-06-05 14:38:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:01,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:01,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:01,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243560701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:01,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:01,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893963560] [2021-06-05 14:38:01,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:01,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:01,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:01,426 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:01,554 INFO L93 Difference]: Finished difference Result 110 states and 223 transitions. [2021-06-05 14:38:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:01,555 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:38:01,555 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:38:01,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:38:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-06-05 14:38:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 14:38:01,556 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 14:38:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:01,556 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 14:38:01,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 14:38:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:01,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:01,556 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:01,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4879,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:01,772 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -95204490, now seen corresponding path program 115 times [2021-06-05 14:38:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:01,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767238028] [2021-06-05 14:38:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:01,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:01,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767238028] [2021-06-05 14:38:01,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767238028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:01,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161140026] [2021-06-05 14:38:01,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:02,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:02,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:02,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:02,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,030 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:38:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:02,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:02,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:38:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161140026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:02,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:02,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73856827] [2021-06-05 14:38:02,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:02,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:02,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:02,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:02,043 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:02,207 INFO L93 Difference]: Finished difference Result 120 states and 249 transitions. [2021-06-05 14:38:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:02,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:02,208 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:38:02,208 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:38:02,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:38:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 14:38:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 14:38:02,209 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 14:38:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:02,209 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 14:38:02,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 14:38:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:02,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:02,209 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:02,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4898,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:02,410 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:02,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:02,410 INFO L82 PathProgramCache]: Analyzing trace with hash 895151053, now seen corresponding path program 116 times [2021-06-05 14:38:02,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:02,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919140787] [2021-06-05 14:38:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:02,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919140787] [2021-06-05 14:38:02,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919140787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255784317] [2021-06-05 14:38:02,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:02,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:02,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255784317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:02,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:02,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802112517] [2021-06-05 14:38:02,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:02,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:02,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:02,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:02,663 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:02,808 INFO L93 Difference]: Finished difference Result 113 states and 229 transitions. [2021-06-05 14:38:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:02,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:02,809 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:38:02,809 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:38:02,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:38:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2021-06-05 14:38:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1052631578947367) internal successors, (200), 95 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 200 transitions. [2021-06-05 14:38:02,810 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 200 transitions. Word has length 17 [2021-06-05 14:38:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:02,810 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 200 transitions. [2021-06-05 14:38:02,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 200 transitions. [2021-06-05 14:38:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:02,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:02,810 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:03,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4922,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:03,011 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1109718968, now seen corresponding path program 117 times [2021-06-05 14:38:03,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:03,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028092964] [2021-06-05 14:38:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:03,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028092964] [2021-06-05 14:38:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028092964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456614618] [2021-06-05 14:38:03,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:03,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:38:03,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:03,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:03,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:03,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:03,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:03,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:03,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:03,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:03,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:03,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:03,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:03,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:03,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:03,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:03,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:03,322 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-06-05 14:38:03,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:03,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:03,347 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:38:03,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:03,348 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:38:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:03,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456614618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:03,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:03,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:03,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016880266] [2021-06-05 14:38:03,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:03,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:03,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:03,370 INFO L87 Difference]: Start difference. First operand 96 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:03,628 INFO L93 Difference]: Finished difference Result 134 states and 270 transitions. [2021-06-05 14:38:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:03,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:03,629 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:38:03,629 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 14:38:03,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 14:38:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2021-06-05 14:38:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:38:03,630 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:38:03,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:03,630 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:38:03,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:38:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:03,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:03,630 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:03,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4941,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:03,831 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:03,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1077772015, now seen corresponding path program 118 times [2021-06-05 14:38:03,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:03,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858798255] [2021-06-05 14:38:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:03,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:03,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858798255] [2021-06-05 14:38:03,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858798255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:03,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840458628] [2021-06-05 14:38:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:03,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:03,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840458628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:04,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:04,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171065705] [2021-06-05 14:38:04,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:04,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:04,138 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:04,331 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 14:38:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:04,332 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:38:04,332 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:38:04,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:38:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2021-06-05 14:38:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 212 transitions. [2021-06-05 14:38:04,333 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 212 transitions. Word has length 17 [2021-06-05 14:38:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:04,333 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 212 transitions. [2021-06-05 14:38:04,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 212 transitions. [2021-06-05 14:38:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:04,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:04,333 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:04,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4983 [2021-06-05 14:38:04,544 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:04,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1557056691, now seen corresponding path program 119 times [2021-06-05 14:38:04,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:04,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271552801] [2021-06-05 14:38:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:04,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271552801] [2021-06-05 14:38:04,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271552801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931415672] [2021-06-05 14:38:04,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:04,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:04,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931415672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:04,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:04,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331372844] [2021-06-05 14:38:04,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:04,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:04,828 INFO L87 Difference]: Start difference. First operand 101 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:04,920 INFO L93 Difference]: Finished difference Result 109 states and 227 transitions. [2021-06-05 14:38:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:04,920 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:38:04,920 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:38:04,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:38:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-06-05 14:38:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 96 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 203 transitions. [2021-06-05 14:38:04,924 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 203 transitions. Word has length 17 [2021-06-05 14:38:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:04,924 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 203 transitions. [2021-06-05 14:38:04,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 203 transitions. [2021-06-05 14:38:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:04,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:04,925 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:05,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5011 [2021-06-05 14:38:05,125 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 762249112, now seen corresponding path program 120 times [2021-06-05 14:38:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:05,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953371256] [2021-06-05 14:38:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:05,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:05,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953371256] [2021-06-05 14:38:05,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953371256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:05,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955284237] [2021-06-05 14:38:05,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:05,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:38:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:05,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:05,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:05,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:05,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:05,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:05,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:05,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:05,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:05,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:05,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:05,436 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:38:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:05,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:05,462 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:38:05,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:05,463 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:38:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955284237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:05,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:05,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:05,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431582618] [2021-06-05 14:38:05,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:05,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:05,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:05,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:05,486 INFO L87 Difference]: Start difference. First operand 97 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:05,641 INFO L93 Difference]: Finished difference Result 111 states and 228 transitions. [2021-06-05 14:38:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:05,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:05,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:05,641 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:38:05,641 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:38:05,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:38:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2021-06-05 14:38:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 14:38:05,642 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-06-05 14:38:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:05,642 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 14:38:05,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 14:38:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:05,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:05,643 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:05,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:05,843 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash 945031308, now seen corresponding path program 121 times [2021-06-05 14:38:05,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:05,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503124796] [2021-06-05 14:38:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:05,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:05,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503124796] [2021-06-05 14:38:05,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503124796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:05,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202526010] [2021-06-05 14:38:05,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:06,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:06,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:06,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:06,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:06,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,144 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:38:06,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:06,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:06,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,151 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:38:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202526010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:06,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:06,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749387396] [2021-06-05 14:38:06,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:06,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:06,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:06,156 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:06,282 INFO L93 Difference]: Finished difference Result 112 states and 232 transitions. [2021-06-05 14:38:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:06,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:06,282 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:38:06,282 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:38:06,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:38:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-06-05 14:38:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 14:38:06,284 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-06-05 14:38:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:06,284 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 14:38:06,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 14:38:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:06,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:06,284 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:06,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5083 [2021-06-05 14:38:06,489 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash -69483170, now seen corresponding path program 122 times [2021-06-05 14:38:06,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:06,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502628787] [2021-06-05 14:38:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:06,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502628787] [2021-06-05 14:38:06,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502628787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980252431] [2021-06-05 14:38:06,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:06,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:06,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:06,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:06,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:06,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:06,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:06,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:06,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:06,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:06,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:06,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:06,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,845 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,847 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,879 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 14:38:06,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:06,881 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,905 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:38:06,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:06,906 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:38:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980252431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:06,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:06,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343395179] [2021-06-05 14:38:06,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:06,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:06,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:06,927 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:07,082 INFO L93 Difference]: Finished difference Result 125 states and 258 transitions. [2021-06-05 14:38:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:07,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:07,083 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:38:07,083 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 14:38:07,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 14:38:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2021-06-05 14:38:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 14:38:07,084 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 14:38:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:07,084 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 14:38:07,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 14:38:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:07,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:07,085 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:07,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:07,289 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:07,289 INFO L82 PathProgramCache]: Analyzing trace with hash -516820893, now seen corresponding path program 123 times [2021-06-05 14:38:07,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:07,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991758454] [2021-06-05 14:38:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:07,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991758454] [2021-06-05 14:38:07,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991758454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035227252] [2021-06-05 14:38:07,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:07,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:07,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035227252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:07,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:07,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103404716] [2021-06-05 14:38:07,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:07,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:07,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:07,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:07,545 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:07,650 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2021-06-05 14:38:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:07,650 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:38:07,650 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:38:07,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:38:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-06-05 14:38:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-06-05 14:38:07,652 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 17 [2021-06-05 14:38:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:07,652 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-06-05 14:38:07,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-06-05 14:38:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:07,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:07,652 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:07,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5198 [2021-06-05 14:38:07,853 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash 518262152, now seen corresponding path program 124 times [2021-06-05 14:38:07,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:07,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512788763] [2021-06-05 14:38:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:07,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512788763] [2021-06-05 14:38:07,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512788763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141970714] [2021-06-05 14:38:07,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:07,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:07,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:08,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:08,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:08,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,226 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:38:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:08,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:08,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:08,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:08,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:08,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:08,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:08,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:08,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:08,356 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:08,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:08,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:08,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:08,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:08,436 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:38:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:08,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141970714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:08,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:08,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:08,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071169967] [2021-06-05 14:38:08,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:08,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:08,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:08,464 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:08,643 INFO L93 Difference]: Finished difference Result 121 states and 241 transitions. [2021-06-05 14:38:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:08,644 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:38:08,644 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:38:08,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:38:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-06-05 14:38:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 14:38:08,645 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 14:38:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:08,645 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 14:38:08,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 14:38:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:08,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:08,646 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:08,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5227,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:08,846 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:08,846 INFO L82 PathProgramCache]: Analyzing trace with hash -464305373, now seen corresponding path program 125 times [2021-06-05 14:38:08,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:08,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705422317] [2021-06-05 14:38:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:08,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:08,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705422317] [2021-06-05 14:38:08,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705422317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:08,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391824336] [2021-06-05 14:38:08,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:08,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:08,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391824336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:09,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:09,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529528718] [2021-06-05 14:38:09,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:09,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:09,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:09,120 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:09,246 INFO L93 Difference]: Finished difference Result 116 states and 241 transitions. [2021-06-05 14:38:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:09,247 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:38:09,247 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:38:09,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:38:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2021-06-05 14:38:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 14:38:09,248 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 14:38:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:09,248 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 14:38:09,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 14:38:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:09,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:09,248 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:09,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5250 [2021-06-05 14:38:09,449 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash -829025908, now seen corresponding path program 126 times [2021-06-05 14:38:09,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:09,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63575543] [2021-06-05 14:38:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63575543] [2021-06-05 14:38:09,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63575543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292787347] [2021-06-05 14:38:09,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:09,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292787347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:09,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:09,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054052247] [2021-06-05 14:38:09,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:09,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:09,737 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:09,896 INFO L93 Difference]: Finished difference Result 104 states and 213 transitions. [2021-06-05 14:38:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:09,896 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:38:09,896 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:38:09,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:38:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-06-05 14:38:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 14:38:09,900 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 14:38:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:09,900 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 14:38:09,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 14:38:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:09,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:09,900 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:10,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5279,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:10,101 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:10,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1167397322, now seen corresponding path program 127 times [2021-06-05 14:38:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:10,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684043079] [2021-06-05 14:38:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:10,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:10,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684043079] [2021-06-05 14:38:10,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684043079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:10,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894202509] [2021-06-05 14:38:10,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:10,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:10,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:10,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:10,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:10,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:10,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:10,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:10,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:10,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:10,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:10,372 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:38:10,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:10,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:10,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:10,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:38:10,379 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:38:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:10,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894202509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:10,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:10,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:10,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292905144] [2021-06-05 14:38:10,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:10,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:10,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:10,385 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:10,516 INFO L93 Difference]: Finished difference Result 116 states and 239 transitions. [2021-06-05 14:38:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:10,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:10,516 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:38:10,516 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:38:10,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:38:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2021-06-05 14:38:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 14:38:10,518 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 14:38:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:10,518 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 14:38:10,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 14:38:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:10,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:10,518 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:10,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5301,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:10,718 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash -177041779, now seen corresponding path program 128 times [2021-06-05 14:38:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:10,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902044482] [2021-06-05 14:38:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:10,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:10,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902044482] [2021-06-05 14:38:10,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902044482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:10,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750929383] [2021-06-05 14:38:10,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:10,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:10,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750929383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:10,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:10,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:10,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343155555] [2021-06-05 14:38:10,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:10,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:10,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:10,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:10,950 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:11,064 INFO L93 Difference]: Finished difference Result 106 states and 214 transitions. [2021-06-05 14:38:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:11,064 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:38:11,064 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:38:11,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:38:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-06-05 14:38:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.095744680851064) internal successors, (197), 94 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 197 transitions. [2021-06-05 14:38:11,065 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 197 transitions. Word has length 17 [2021-06-05 14:38:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:11,066 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 197 transitions. [2021-06-05 14:38:11,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 197 transitions. [2021-06-05 14:38:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:11,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:11,066 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:11,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5331 [2021-06-05 14:38:11,274 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:11,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2113055496, now seen corresponding path program 129 times [2021-06-05 14:38:11,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:11,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705161840] [2021-06-05 14:38:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:11,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705161840] [2021-06-05 14:38:11,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705161840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697616267] [2021-06-05 14:38:11,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:11,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:38:11,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:11,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:11,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:11,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:11,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:11,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:11,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:11,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:11,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:11,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:11,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:11,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,661 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:38:11,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:11,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,687 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:38:11,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:11,688 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:38:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697616267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:11,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539892552] [2021-06-05 14:38:11,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:11,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:11,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:11,709 INFO L87 Difference]: Start difference. First operand 95 states and 197 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:11,823 INFO L93 Difference]: Finished difference Result 127 states and 261 transitions. [2021-06-05 14:38:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:11,824 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:38:11,824 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:38:11,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:38:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2021-06-05 14:38:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.094736842105263) internal successors, (199), 95 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 199 transitions. [2021-06-05 14:38:11,825 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 199 transitions. Word has length 17 [2021-06-05 14:38:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:11,825 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 199 transitions. [2021-06-05 14:38:11,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 199 transitions. [2021-06-05 14:38:11,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:11,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:11,825 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:12,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5351 [2021-06-05 14:38:12,033 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:12,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1665717773, now seen corresponding path program 130 times [2021-06-05 14:38:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:12,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443682628] [2021-06-05 14:38:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:12,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:12,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443682628] [2021-06-05 14:38:12,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443682628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465211739] [2021-06-05 14:38:12,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:12,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465211739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:12,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:12,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774690686] [2021-06-05 14:38:12,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:12,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:12,302 INFO L87 Difference]: Start difference. First operand 96 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:12,421 INFO L93 Difference]: Finished difference Result 102 states and 211 transitions. [2021-06-05 14:38:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:12,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:12,422 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:38:12,422 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:38:12,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:38:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2021-06-05 14:38:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.096774193548387) internal successors, (195), 93 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 195 transitions. [2021-06-05 14:38:12,423 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 195 transitions. Word has length 17 [2021-06-05 14:38:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:12,423 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 195 transitions. [2021-06-05 14:38:12,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 195 transitions. [2021-06-05 14:38:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:12,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:12,423 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:12,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5414,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:12,624 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1594166478, now seen corresponding path program 131 times [2021-06-05 14:38:12,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:12,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278536748] [2021-06-05 14:38:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:12,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278536748] [2021-06-05 14:38:12,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278536748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135031438] [2021-06-05 14:38:12,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:12,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:38:12,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:12,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:12,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:12,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:12,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,936 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-06-05 14:38:12,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:12,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:12,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:12,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:12,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:12,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:13,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:13,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:13,001 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:38:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135031438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:13,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:13,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308362667] [2021-06-05 14:38:13,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:13,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:13,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:13,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:13,029 INFO L87 Difference]: Start difference. First operand 94 states and 195 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:13,141 INFO L93 Difference]: Finished difference Result 120 states and 239 transitions. [2021-06-05 14:38:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:13,142 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:38:13,142 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:38:13,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:13,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:38:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 14:38:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1052631578947367) internal successors, (200), 95 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 200 transitions. [2021-06-05 14:38:13,143 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 200 transitions. Word has length 17 [2021-06-05 14:38:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:13,143 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 200 transitions. [2021-06-05 14:38:13,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 200 transitions. [2021-06-05 14:38:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:13,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:13,143 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:13,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5452 [2021-06-05 14:38:13,344 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:13,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2041504201, now seen corresponding path program 132 times [2021-06-05 14:38:13,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:13,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409214979] [2021-06-05 14:38:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409214979] [2021-06-05 14:38:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409214979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715514609] [2021-06-05 14:38:13,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:13,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:38:13,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:13,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715514609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:13,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:13,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751516677] [2021-06-05 14:38:13,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:13,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:13,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:13,614 INFO L87 Difference]: Start difference. First operand 96 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:13,796 INFO L93 Difference]: Finished difference Result 151 states and 299 transitions. [2021-06-05 14:38:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:13,796 INFO L225 Difference]: With dead ends: 151 [2021-06-05 14:38:13,797 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:38:13,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:38:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2021-06-05 14:38:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 14:38:13,798 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 14:38:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:13,798 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 14:38:13,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 14:38:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:13,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:13,800 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:14,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5472 [2021-06-05 14:38:14,009 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1718233293, now seen corresponding path program 133 times [2021-06-05 14:38:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:14,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989289826] [2021-06-05 14:38:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:14,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989289826] [2021-06-05 14:38:14,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989289826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408848543] [2021-06-05 14:38:14,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:14,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408848543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:14,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:14,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:14,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744834527] [2021-06-05 14:38:14,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:14,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:14,238 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:14,388 INFO L93 Difference]: Finished difference Result 116 states and 240 transitions. [2021-06-05 14:38:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:14,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:14,388 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:38:14,388 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:38:14,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:38:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2021-06-05 14:38:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 14:38:14,390 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 14:38:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:14,390 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 14:38:14,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 14:38:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:14,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:14,390 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:14,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5500,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:14,591 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1353512758, now seen corresponding path program 134 times [2021-06-05 14:38:14,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:14,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94136120] [2021-06-05 14:38:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:14,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:14,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94136120] [2021-06-05 14:38:14,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94136120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:14,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586079619] [2021-06-05 14:38:14,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:14,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:14,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:14,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:14,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586079619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:14,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:14,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:14,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414333685] [2021-06-05 14:38:14,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:14,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:14,898 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:15,093 INFO L93 Difference]: Finished difference Result 104 states and 212 transitions. [2021-06-05 14:38:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:15,094 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:38:15,094 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:38:15,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:38:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-06-05 14:38:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.097826086956522) internal successors, (193), 92 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 193 transitions. [2021-06-05 14:38:15,095 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 193 transitions. Word has length 17 [2021-06-05 14:38:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:15,095 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 193 transitions. [2021-06-05 14:38:15,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 193 transitions. [2021-06-05 14:38:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:15,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:15,095 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:15,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5517,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:15,295 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash -553930680, now seen corresponding path program 135 times [2021-06-05 14:38:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:15,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209632165] [2021-06-05 14:38:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:15,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:15,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209632165] [2021-06-05 14:38:15,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209632165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:15,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649849348] [2021-06-05 14:38:15,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:15,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:38:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:15,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:15,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:15,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:15,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,686 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 14:38:15,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:15,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:15,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:15,755 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:15,786 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:15,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:15,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:15,871 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:15,895 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:38:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:15,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649849348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:15,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:15,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339427646] [2021-06-05 14:38:15,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:15,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:15,923 INFO L87 Difference]: Start difference. First operand 93 states and 193 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:16,191 INFO L93 Difference]: Finished difference Result 127 states and 251 transitions. [2021-06-05 14:38:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:16,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:16,192 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:38:16,192 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:38:16,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:38:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2021-06-05 14:38:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 14:38:16,193 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 14:38:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:16,193 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 14:38:16,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 14:38:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:16,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:16,193 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:16,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-05 14:38:16,400 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1001268403, now seen corresponding path program 136 times [2021-06-05 14:38:16,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:16,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224113775] [2021-06-05 14:38:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:16,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:16,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224113775] [2021-06-05 14:38:16,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224113775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:16,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384421998] [2021-06-05 14:38:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:16,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:16,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:16,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:16,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384421998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:16,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:16,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:16,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117246340] [2021-06-05 14:38:16,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:16,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:16,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:16,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:16,680 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:16,971 INFO L93 Difference]: Finished difference Result 146 states and 289 transitions. [2021-06-05 14:38:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:16,971 INFO L225 Difference]: With dead ends: 146 [2021-06-05 14:38:16,971 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:38:16,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:38:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2021-06-05 14:38:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 14:38:16,973 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 14:38:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:16,973 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 14:38:16,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 14:38:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:16,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:16,973 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:17,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5563 [2021-06-05 14:38:17,173 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1536498205, now seen corresponding path program 137 times [2021-06-05 14:38:17,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:17,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162431981] [2021-06-05 14:38:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162431981] [2021-06-05 14:38:17,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162431981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966740513] [2021-06-05 14:38:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:17,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:17,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:17,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966740513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:17,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:17,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656027283] [2021-06-05 14:38:17,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:17,417 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:17,603 INFO L93 Difference]: Finished difference Result 118 states and 245 transitions. [2021-06-05 14:38:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:17,603 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:38:17,604 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:38:17,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:17,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:38:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2021-06-05 14:38:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 209 transitions. [2021-06-05 14:38:17,605 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 209 transitions. Word has length 17 [2021-06-05 14:38:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:17,605 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 209 transitions. [2021-06-05 14:38:17,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 209 transitions. [2021-06-05 14:38:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:17,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:17,605 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:17,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5593 [2021-06-05 14:38:17,806 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1901218740, now seen corresponding path program 138 times [2021-06-05 14:38:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:17,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748527989] [2021-06-05 14:38:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:17,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748527989] [2021-06-05 14:38:17,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748527989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376934010] [2021-06-05 14:38:17,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:17,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:17,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:18,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376934010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:18,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:18,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:18,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577768435] [2021-06-05 14:38:18,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:18,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:18,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:18,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:18,143 INFO L87 Difference]: Start difference. First operand 98 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:18,416 INFO L93 Difference]: Finished difference Result 116 states and 239 transitions. [2021-06-05 14:38:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:18,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:18,416 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:38:18,416 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:38:18,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:38:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2021-06-05 14:38:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1458333333333335) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 206 transitions. [2021-06-05 14:38:18,417 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 206 transitions. Word has length 17 [2021-06-05 14:38:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:18,417 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 206 transitions. [2021-06-05 14:38:18,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 206 transitions. [2021-06-05 14:38:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:18,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:18,418 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:18,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5614,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:18,618 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:18,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash -948752883, now seen corresponding path program 139 times [2021-06-05 14:38:18,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:18,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107600722] [2021-06-05 14:38:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:18,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:18,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107600722] [2021-06-05 14:38:18,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107600722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:18,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719341430] [2021-06-05 14:38:18,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:18,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719341430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:18,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:18,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:18,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856278679] [2021-06-05 14:38:18,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:18,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:18,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:18,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:18,853 INFO L87 Difference]: Start difference. First operand 97 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:18,995 INFO L93 Difference]: Finished difference Result 114 states and 235 transitions. [2021-06-05 14:38:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:18,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:18,995 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:38:18,995 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:38:18,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:38:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-06-05 14:38:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 14:38:18,997 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-06-05 14:38:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:18,997 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 14:38:18,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 14:38:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:18,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:18,997 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:19,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5637 [2021-06-05 14:38:19,203 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:19,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1381056024, now seen corresponding path program 140 times [2021-06-05 14:38:19,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:19,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481018184] [2021-06-05 14:38:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:19,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:19,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481018184] [2021-06-05 14:38:19,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481018184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409021884] [2021-06-05 14:38:19,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:19,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:19,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409021884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:19,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335844604] [2021-06-05 14:38:19,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:19,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:19,494 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:19,657 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-06-05 14:38:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:19,657 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:38:19,657 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:38:19,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:38:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2021-06-05 14:38:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-06-05 14:38:19,658 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-06-05 14:38:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:19,658 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-06-05 14:38:19,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-06-05 14:38:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:19,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:19,659 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:19,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:19,859 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1642480648, now seen corresponding path program 141 times [2021-06-05 14:38:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:19,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581616257] [2021-06-05 14:38:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:19,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:19,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581616257] [2021-06-05 14:38:19,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581616257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815409131] [2021-06-05 14:38:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:19,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:38:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:20,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:20,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:20,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:20,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:20,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,114 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:38:20,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:20,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:20,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,121 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:38:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:20,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815409131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:20,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:20,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:20,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794668232] [2021-06-05 14:38:20,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:20,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:20,126 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:20,260 INFO L93 Difference]: Finished difference Result 121 states and 249 transitions. [2021-06-05 14:38:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:20,260 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:38:20,260 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:38:20,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:38:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-06-05 14:38:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-06-05 14:38:20,261 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-06-05 14:38:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:20,261 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-06-05 14:38:20,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-06-05 14:38:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:20,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:20,262 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:20,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5683 [2021-06-05 14:38:20,462 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:20,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1968280738, now seen corresponding path program 142 times [2021-06-05 14:38:20,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:20,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739531657] [2021-06-05 14:38:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:20,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:20,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739531657] [2021-06-05 14:38:20,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739531657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:20,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405642723] [2021-06-05 14:38:20,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:20,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:20,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:20,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:20,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:20,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:20,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:20,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:20,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:20,762 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:20,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:20,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:20,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,800 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:38:20,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:20,803 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:20,826 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:38:20,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:20,827 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:38:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405642723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:20,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:20,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:20,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711173763] [2021-06-05 14:38:20,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:20,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:20,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:20,846 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:20,999 INFO L93 Difference]: Finished difference Result 127 states and 260 transitions. [2021-06-05 14:38:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:21,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:21,000 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:38:21,000 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:38:21,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:38:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2021-06-05 14:38:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 187 transitions. [2021-06-05 14:38:21,001 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 187 transitions. Word has length 17 [2021-06-05 14:38:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:21,001 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 187 transitions. [2021-06-05 14:38:21,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 187 transitions. [2021-06-05 14:38:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:21,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:21,001 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:21,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5713 [2021-06-05 14:38:21,217 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:21,217 INFO L82 PathProgramCache]: Analyzing trace with hash 180628447, now seen corresponding path program 143 times [2021-06-05 14:38:21,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:21,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552716475] [2021-06-05 14:38:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:21,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:21,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552716475] [2021-06-05 14:38:21,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552716475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051114795] [2021-06-05 14:38:21,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:21,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:38:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:21,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:21,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051114795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:21,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:21,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884682106] [2021-06-05 14:38:21,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:21,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:21,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:21,503 INFO L87 Difference]: Start difference. First operand 91 states and 187 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:21,624 INFO L93 Difference]: Finished difference Result 104 states and 213 transitions. [2021-06-05 14:38:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:21,625 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:38:21,625 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:38:21,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:38:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2021-06-05 14:38:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 183 transitions. [2021-06-05 14:38:21,626 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 183 transitions. Word has length 17 [2021-06-05 14:38:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:21,626 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 183 transitions. [2021-06-05 14:38:21,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 183 transitions. [2021-06-05 14:38:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:21,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:21,626 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:21,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5781 [2021-06-05 14:38:21,833 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1215711492, now seen corresponding path program 144 times [2021-06-05 14:38:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:21,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835006330] [2021-06-05 14:38:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:21,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835006330] [2021-06-05 14:38:21,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835006330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823120240] [2021-06-05 14:38:21,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:21,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:38:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:22,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:22,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:22,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,170 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 14:38:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:22,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:22,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:22,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:22,240 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:22,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:22,271 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:22,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:22,300 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:22,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:22,329 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:22,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:22,355 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:22,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:22,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:22,379 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:38:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:22,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823120240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:22,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:22,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443985838] [2021-06-05 14:38:22,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:22,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:22,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:22,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:22,406 INFO L87 Difference]: Start difference. First operand 89 states and 183 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:22,557 INFO L93 Difference]: Finished difference Result 125 states and 247 transitions. [2021-06-05 14:38:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:22,558 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:38:22,558 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 14:38:22,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 14:38:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2021-06-05 14:38:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 187 transitions. [2021-06-05 14:38:22,559 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 187 transitions. Word has length 17 [2021-06-05 14:38:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:22,559 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 187 transitions. [2021-06-05 14:38:22,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 187 transitions. [2021-06-05 14:38:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:22,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:22,559 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:22,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5818 [2021-06-05 14:38:22,765 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1247658445, now seen corresponding path program 145 times [2021-06-05 14:38:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:22,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147402107] [2021-06-05 14:38:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:22,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147402107] [2021-06-05 14:38:22,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147402107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:22,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341286536] [2021-06-05 14:38:22,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:23,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341286536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:23,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:23,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:23,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909452816] [2021-06-05 14:38:23,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:23,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:23,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:23,082 INFO L87 Difference]: Start difference. First operand 90 states and 187 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:23,292 INFO L93 Difference]: Finished difference Result 136 states and 267 transitions. [2021-06-05 14:38:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:23,293 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:38:23,293 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:38:23,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:38:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2021-06-05 14:38:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 14:38:23,294 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 14:38:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:23,294 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 14:38:23,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 14:38:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:23,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:23,294 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:23,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:23,495 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash 768373769, now seen corresponding path program 146 times [2021-06-05 14:38:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:23,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126693906] [2021-06-05 14:38:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:23,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:23,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126693906] [2021-06-05 14:38:23,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126693906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:23,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714534038] [2021-06-05 14:38:23,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:23,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:23,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:23,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714534038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:23,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:23,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:23,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94309994] [2021-06-05 14:38:23,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:23,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:23,798 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:24,001 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-06-05 14:38:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:38:24,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:24,002 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:38:24,002 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 14:38:24,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 14:38:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2021-06-05 14:38:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 198 transitions. [2021-06-05 14:38:24,003 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 198 transitions. Word has length 17 [2021-06-05 14:38:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:24,003 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 198 transitions. [2021-06-05 14:38:24,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 198 transitions. [2021-06-05 14:38:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:24,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:24,004 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:24,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5894 [2021-06-05 14:38:24,204 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:24,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:24,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1207287724, now seen corresponding path program 147 times [2021-06-05 14:38:24,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:24,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654071350] [2021-06-05 14:38:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:24,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:24,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654071350] [2021-06-05 14:38:24,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654071350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:24,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969315522] [2021-06-05 14:38:24,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:24,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:24,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:24,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:24,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,531 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:38:24,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:24,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:24,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:24,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:24,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:24,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:24,632 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:24,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:24,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:24,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:24,689 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:24,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:24,716 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:24,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:24,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:24,740 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:38:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:24,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969315522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:24,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:24,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683718287] [2021-06-05 14:38:24,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:24,768 INFO L87 Difference]: Start difference. First operand 95 states and 198 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:24,973 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-06-05 14:38:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:24,973 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:38:24,973 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 14:38:24,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 14:38:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 94. [2021-06-05 14:38:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.096774193548387) internal successors, (195), 93 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 195 transitions. [2021-06-05 14:38:24,974 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 195 transitions. Word has length 17 [2021-06-05 14:38:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:24,974 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 195 transitions. [2021-06-05 14:38:24,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 195 transitions. [2021-06-05 14:38:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:24,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:24,975 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:25,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5949,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:25,175 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash 233143967, now seen corresponding path program 148 times [2021-06-05 14:38:25,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:25,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895774130] [2021-06-05 14:38:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:25,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:25,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895774130] [2021-06-05 14:38:25,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895774130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:25,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102721363] [2021-06-05 14:38:25,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:25,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:25,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:25,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:25,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102721363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:25,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:25,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838373046] [2021-06-05 14:38:25,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:25,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:25,386 INFO L87 Difference]: Start difference. First operand 94 states and 195 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:25,551 INFO L93 Difference]: Finished difference Result 114 states and 232 transitions. [2021-06-05 14:38:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:25,551 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:38:25,551 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:38:25,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:38:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-06-05 14:38:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 183 transitions. [2021-06-05 14:38:25,553 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 183 transitions. Word has length 17 [2021-06-05 14:38:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:25,553 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 183 transitions. [2021-06-05 14:38:25,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 183 transitions. [2021-06-05 14:38:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:25,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:25,553 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:25,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5973,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:25,769 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash -131576568, now seen corresponding path program 149 times [2021-06-05 14:38:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:25,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338883481] [2021-06-05 14:38:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:25,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:25,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338883481] [2021-06-05 14:38:25,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338883481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:25,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667859511] [2021-06-05 14:38:25,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:25,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:25,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:26,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667859511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:26,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:26,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:26,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903951793] [2021-06-05 14:38:26,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:26,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:26,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:26,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:26,069 INFO L87 Difference]: Start difference. First operand 89 states and 183 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:26,256 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 14:38:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:26,257 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:38:26,257 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:38:26,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:38:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2021-06-05 14:38:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-06-05 14:38:26,258 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-06-05 14:38:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:26,258 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-06-05 14:38:26,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-06-05 14:38:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:26,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:26,258 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:26,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5994,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:26,459 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2039020006, now seen corresponding path program 150 times [2021-06-05 14:38:26,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:26,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568210681] [2021-06-05 14:38:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:26,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:26,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568210681] [2021-06-05 14:38:26,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568210681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:26,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217951602] [2021-06-05 14:38:26,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:26,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:38:26,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:26,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:26,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:26,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:26,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:26,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:26,842 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 14:38:26,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:26,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:26,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:26,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:26,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:26,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:26,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:26,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:26,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:26,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:26,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:26,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:26,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:26,976 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:27,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:27,004 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:27,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:27,031 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:27,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:27,055 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:38:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:27,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217951602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:27,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:27,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:27,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27649300] [2021-06-05 14:38:27,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:27,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:27,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:27,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:27,083 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:27,428 INFO L93 Difference]: Finished difference Result 126 states and 244 transitions. [2021-06-05 14:38:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:38:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:27,429 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:38:27,429 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:38:27,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:38:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 87. [2021-06-05 14:38:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-06-05 14:38:27,430 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-06-05 14:38:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:27,430 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-06-05 14:38:27,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-06-05 14:38:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:27,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:27,430 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:27,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6023 [2021-06-05 14:38:27,630 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1808609567, now seen corresponding path program 151 times [2021-06-05 14:38:27,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:27,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248720003] [2021-06-05 14:38:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:27,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:27,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248720003] [2021-06-05 14:38:27,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248720003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:27,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123798413] [2021-06-05 14:38:27,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:27,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123798413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:27,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:27,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:27,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174301157] [2021-06-05 14:38:27,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:27,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:27,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:27,995 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:28,211 INFO L93 Difference]: Finished difference Result 132 states and 256 transitions. [2021-06-05 14:38:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:28,212 INFO L225 Difference]: With dead ends: 132 [2021-06-05 14:38:28,212 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 14:38:28,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 14:38:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2021-06-05 14:38:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 88 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 186 transitions. [2021-06-05 14:38:28,213 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 186 transitions. Word has length 17 [2021-06-05 14:38:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:28,213 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 186 transitions. [2021-06-05 14:38:28,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 186 transitions. [2021-06-05 14:38:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:28,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:28,213 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:28,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6045 [2021-06-05 14:38:28,414 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:28,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1273379765, now seen corresponding path program 152 times [2021-06-05 14:38:28,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:28,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280472216] [2021-06-05 14:38:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:28,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:28,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280472216] [2021-06-05 14:38:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280472216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:28,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558775192] [2021-06-05 14:38:28,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:28,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:28,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:28,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:28,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558775192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:28,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:28,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:28,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002129176] [2021-06-05 14:38:28,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:28,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:28,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:28,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:28,682 INFO L87 Difference]: Start difference. First operand 89 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:28,808 INFO L93 Difference]: Finished difference Result 109 states and 222 transitions. [2021-06-05 14:38:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:28,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:28,809 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:38:28,809 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:38:28,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:38:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2021-06-05 14:38:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 88 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 186 transitions. [2021-06-05 14:38:28,810 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 186 transitions. Word has length 17 [2021-06-05 14:38:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:28,810 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 186 transitions. [2021-06-05 14:38:28,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 186 transitions. [2021-06-05 14:38:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:28,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:28,811 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:29,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6112 [2021-06-05 14:38:29,011 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:29,011 INFO L82 PathProgramCache]: Analyzing trace with hash 908659230, now seen corresponding path program 153 times [2021-06-05 14:38:29,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:29,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090028494] [2021-06-05 14:38:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:29,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090028494] [2021-06-05 14:38:29,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090028494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242235084] [2021-06-05 14:38:29,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:29,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:29,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:29,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242235084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:29,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:29,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121314197] [2021-06-05 14:38:29,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:29,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:29,349 INFO L87 Difference]: Start difference. First operand 89 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:29,601 INFO L93 Difference]: Finished difference Result 115 states and 224 transitions. [2021-06-05 14:38:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:29,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:29,602 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:38:29,602 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:38:29,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 324.1ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:38:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2021-06-05 14:38:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 183 transitions. [2021-06-05 14:38:29,603 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 183 transitions. Word has length 17 [2021-06-05 14:38:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:29,603 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 183 transitions. [2021-06-05 14:38:29,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 183 transitions. [2021-06-05 14:38:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:29,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:29,603 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:29,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6141,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:29,804 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1861125087, now seen corresponding path program 154 times [2021-06-05 14:38:29,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:29,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473567173] [2021-06-05 14:38:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:29,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:29,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473567173] [2021-06-05 14:38:29,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473567173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556999008] [2021-06-05 14:38:29,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:29,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:29,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556999008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:30,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:38:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180741311] [2021-06-05 14:38:30,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:30,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:30,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:30,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:30,005 INFO L87 Difference]: Start difference. First operand 88 states and 183 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:30,142 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2021-06-05 14:38:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:30,143 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:38:30,143 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:38:30,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:38:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2021-06-05 14:38:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-06-05 14:38:30,144 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 17 [2021-06-05 14:38:30,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:30,144 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-06-05 14:38:30,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,144 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-06-05 14:38:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:30,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:30,144 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:30,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-05 14:38:30,345 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash -104033302, now seen corresponding path program 155 times [2021-06-05 14:38:30,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:30,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091619549] [2021-06-05 14:38:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:30,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091619549] [2021-06-05 14:38:30,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091619549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414790012] [2021-06-05 14:38:30,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:30,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414790012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:30,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:38:30,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217233270] [2021-06-05 14:38:30,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:30,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:30,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:30,587 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:30,713 INFO L93 Difference]: Finished difference Result 91 states and 180 transitions. [2021-06-05 14:38:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:30,714 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:38:30,714 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:38:30,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:38:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-06-05 14:38:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 14:38:30,715 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 14:38:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:30,715 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 14:38:30,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 14:38:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:30,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:30,715 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:30,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6172,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:30,915 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash -701452792, now seen corresponding path program 156 times [2021-06-05 14:38:30,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:30,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519572463] [2021-06-05 14:38:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:30,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519572463] [2021-06-05 14:38:30,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519572463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104224754] [2021-06-05 14:38:30,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:31,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:38:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:31,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:31,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:31,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,342 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:38:31,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:31,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:31,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:31,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:31,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:31,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:31,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:31,444 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:31,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:31,475 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:31,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:31,503 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:31,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:31,530 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:31,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:31,553 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:38:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:31,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104224754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:31,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:31,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:31,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665675215] [2021-06-05 14:38:31,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:31,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:31,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:31,582 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:32,057 INFO L93 Difference]: Finished difference Result 114 states and 219 transitions. [2021-06-05 14:38:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:38:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:32,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:32,058 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:38:32,058 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:38:32,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:38:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-06-05 14:38:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.049382716049383) internal successors, (166), 81 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2021-06-05 14:38:32,059 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 17 [2021-06-05 14:38:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:32,059 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2021-06-05 14:38:32,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2021-06-05 14:38:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:32,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:32,059 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:32,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6185 [2021-06-05 14:38:32,269 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:32,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1684020317, now seen corresponding path program 157 times [2021-06-05 14:38:32,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:32,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522693365] [2021-06-05 14:38:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:32,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522693365] [2021-06-05 14:38:32,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522693365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985358661] [2021-06-05 14:38:32,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:32,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985358661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:32,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:32,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:38:32,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216090535] [2021-06-05 14:38:32,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:32,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:32,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:32,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:32,454 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:32,569 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 14:38:32,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:32,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:32,569 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:38:32,569 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:38:32,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:38:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-06-05 14:38:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 14:38:32,570 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 14:38:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:32,571 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 14:38:32,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 14:38:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:32,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:32,571 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:32,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6207,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:32,771 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2048740852, now seen corresponding path program 158 times [2021-06-05 14:38:32,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:32,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416649330] [2021-06-05 14:38:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:32,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416649330] [2021-06-05 14:38:32,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416649330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946417993] [2021-06-05 14:38:32,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:32,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:32,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:32,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:33,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946417993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:33,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:33,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:33,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964798227] [2021-06-05 14:38:33,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:33,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:33,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:33,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:33,110 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:33,448 INFO L93 Difference]: Finished difference Result 114 states and 217 transitions. [2021-06-05 14:38:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:33,448 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:38:33,448 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:38:33,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:38:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2021-06-05 14:38:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:38:33,449 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:38:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:33,449 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:38:33,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:38:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:33,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:33,450 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:33,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6211 [2021-06-05 14:38:33,650 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1096274995, now seen corresponding path program 159 times [2021-06-05 14:38:33,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:33,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5744852] [2021-06-05 14:38:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:33,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:33,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5744852] [2021-06-05 14:38:33,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5744852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:33,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130865055] [2021-06-05 14:38:33,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:33,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:33,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130865055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:33,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:33,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:33,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102944858] [2021-06-05 14:38:33,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:33,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:33,832 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:33,948 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-06-05 14:38:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:33,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:33,949 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:38:33,949 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:38:33,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:38:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 14:38:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:38:33,950 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:38:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:33,950 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:38:33,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:38:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:33,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:33,950 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:34,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6234 [2021-06-05 14:38:34,150 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1233533912, now seen corresponding path program 160 times [2021-06-05 14:38:34,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:34,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222005337] [2021-06-05 14:38:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:34,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222005337] [2021-06-05 14:38:34,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222005337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683009136] [2021-06-05 14:38:34,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:34,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:34,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:34,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683009136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:34,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:38:34,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777422118] [2021-06-05 14:38:34,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:34,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:34,431 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:34,713 INFO L93 Difference]: Finished difference Result 109 states and 205 transitions. [2021-06-05 14:38:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:34,713 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:38:34,713 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:38:34,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:38:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-06-05 14:38:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 14:38:34,714 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 14:38:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:34,714 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 14:38:34,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 14:38:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:34,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:34,715 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:34,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6238,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:34,915 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:34,915 INFO L82 PathProgramCache]: Analyzing trace with hash -498938337, now seen corresponding path program 161 times [2021-06-05 14:38:34,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:34,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143972837] [2021-06-05 14:38:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:34,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143972837] [2021-06-05 14:38:34,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143972837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794413007] [2021-06-05 14:38:34,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:35,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:35,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:35,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:35,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794413007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:35,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:35,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:38:35,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111845601] [2021-06-05 14:38:35,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:38:35,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:35,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:38:35,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:38:35,072 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:35,180 INFO L93 Difference]: Finished difference Result 119 states and 227 transitions. [2021-06-05 14:38:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:35,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:35,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:35,181 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:38:35,181 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:38:35,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:38:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2021-06-05 14:38:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 14:38:35,182 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 14:38:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:35,182 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 14:38:35,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 14:38:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:38:35,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:35,182 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:35,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6249,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:35,382 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash -538062648, now seen corresponding path program 162 times [2021-06-05 14:38:35,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:35,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873542258] [2021-06-05 14:38:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:35,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873542258] [2021-06-05 14:38:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873542258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180199498] [2021-06-05 14:38:35,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:35,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:38:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:35,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180199498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:35,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:35,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:38:35,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995369354] [2021-06-05 14:38:35,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:38:35,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:38:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:38:35,595 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:35,776 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 14:38:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:35,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:38:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:35,777 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:38:35,777 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:38:35,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:38:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-06-05 14:38:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 158 transitions. [2021-06-05 14:38:35,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 158 transitions. Word has length 17 [2021-06-05 14:38:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:35,778 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 158 transitions. [2021-06-05 14:38:35,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 158 transitions. [2021-06-05 14:38:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:35,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:35,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:35,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6253 [2021-06-05 14:38:35,985 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1488406346, now seen corresponding path program 163 times [2021-06-05 14:38:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:35,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322773492] [2021-06-05 14:38:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:36,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:36,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322773492] [2021-06-05 14:38:36,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322773492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:36,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744222169] [2021-06-05 14:38:36,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:36,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:36,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:36,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:36,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:38:36,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:36,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,912 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 14:38:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:36,915 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:36,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:36,957 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:36,974 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:38:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744222169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:37,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:37,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:38:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512210628] [2021-06-05 14:38:37,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:38:37,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:38:37,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:37,046 INFO L87 Difference]: Start difference. First operand 79 states and 158 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,276 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 14:38:37,567 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 14:38:37,719 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 14:38:37,863 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 14:38:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:37,895 INFO L93 Difference]: Finished difference Result 150 states and 283 transitions. [2021-06-05 14:38:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:37,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:37,895 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:38:37,895 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:38:37,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1077.0ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:38:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2021-06-05 14:38:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 14:38:37,897 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 14:38:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:37,897 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 14:38:37,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 14:38:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:37,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:37,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:38,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6264 [2021-06-05 14:38:38,098 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:38,098 INFO L82 PathProgramCache]: Analyzing trace with hash -857142774, now seen corresponding path program 164 times [2021-06-05 14:38:38,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:38,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892773238] [2021-06-05 14:38:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:38,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:38,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892773238] [2021-06-05 14:38:38,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892773238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:38,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780680578] [2021-06-05 14:38:38,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:38,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:38,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:38,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:38,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:38,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:38,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:38:38,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:38,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,986 INFO L628 ElimStorePlain]: treesize reduction 123, result has 32.4 percent of original size [2021-06-05 14:38:38,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:38,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:39,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:39,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:39,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:39,031 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:39,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:39,048 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:38:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:39,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780680578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:39,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:39,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:38:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752641041] [2021-06-05 14:38:39,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:38:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:38:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:39,122 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:39,513 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 14:38:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:40,372 INFO L93 Difference]: Finished difference Result 178 states and 345 transitions. [2021-06-05 14:38:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:38:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:40,373 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:38:40,373 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:38:40,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1449.3ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:38:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:38:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 84. [2021-06-05 14:38:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 14:38:40,374 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-06-05 14:38:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:40,374 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 14:38:40,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 14:38:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:40,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:40,374 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:40,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6418 [2021-06-05 14:38:40,589 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash 48811164, now seen corresponding path program 165 times [2021-06-05 14:38:40,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:40,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352854805] [2021-06-05 14:38:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:40,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352854805] [2021-06-05 14:38:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352854805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897993001] [2021-06-05 14:38:40,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:40,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:40,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:41,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:41,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:41,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:38:41,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:41,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:41,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,535 INFO L628 ElimStorePlain]: treesize reduction 160, result has 26.6 percent of original size [2021-06-05 14:38:41,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:41,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:41,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:41,560 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:41,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:41,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:41,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:41,598 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-06-05 14:38:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:41,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897993001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:41,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:41,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:38:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793037999] [2021-06-05 14:38:41,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:41,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:41,673 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:42,153 INFO L93 Difference]: Finished difference Result 136 states and 268 transitions. [2021-06-05 14:38:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:38:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:42,153 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:38:42,153 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:38:42,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:38:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2021-06-05 14:38:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 85 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 174 transitions. [2021-06-05 14:38:42,154 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 174 transitions. Word has length 18 [2021-06-05 14:38:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:42,155 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 174 transitions. [2021-06-05 14:38:42,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 174 transitions. [2021-06-05 14:38:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:42,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:42,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:42,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6518,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:42,355 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:42,355 INFO L82 PathProgramCache]: Analyzing trace with hash -982261800, now seen corresponding path program 166 times [2021-06-05 14:38:42,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:42,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85735404] [2021-06-05 14:38:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:42,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:42,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85735404] [2021-06-05 14:38:42,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85735404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:42,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315057221] [2021-06-05 14:38:42,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:42,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:42,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:38:43,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:43,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:43,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:43,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:43,195 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,255 INFO L628 ElimStorePlain]: treesize reduction 172, result has 26.2 percent of original size [2021-06-05 14:38:43,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:43,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:43,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:43,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:43,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:43,302 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:43,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:43,319 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:387, output treesize:46 [2021-06-05 14:38:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:43,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315057221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:43,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:43,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:38:43,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601005131] [2021-06-05 14:38:43,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:43,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:43,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:43,392 INFO L87 Difference]: Start difference. First operand 86 states and 174 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:43,772 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-06-05 14:38:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:43,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:43,772 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:38:43,773 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:38:43,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:38:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-05 14:38:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-06-05 14:38:43,774 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 18 [2021-06-05 14:38:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:43,774 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-06-05 14:38:43,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-06-05 14:38:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:43,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:43,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:43,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6665,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:43,974 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1339782428, now seen corresponding path program 167 times [2021-06-05 14:38:43,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:43,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934514818] [2021-06-05 14:38:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:44,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:44,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934514818] [2021-06-05 14:38:44,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934514818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:44,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075451937] [2021-06-05 14:38:44,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:44,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:44,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:44,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:44,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:44,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:44,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:44,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:44,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:44,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:44,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:44,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:38:44,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:44,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:44,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:44,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:44,778 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 14:38:44,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:44,781 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:44,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:44,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:44,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:44,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:44,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:44,824 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:44,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:44,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:44,841 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:38:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:44,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075451937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:44,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:44,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:38:44,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841721396] [2021-06-05 14:38:44,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:44,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:44,914 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:45,308 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-06-05 14:38:45,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:45,309 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:38:45,309 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:38:45,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:38:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2021-06-05 14:38:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.045977011494253) internal successors, (178), 87 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 178 transitions. [2021-06-05 14:38:45,310 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 178 transitions. Word has length 18 [2021-06-05 14:38:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:45,310 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 178 transitions. [2021-06-05 14:38:45,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 178 transitions. [2021-06-05 14:38:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:45,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:45,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:45,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6810,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:45,511 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:45,511 INFO L82 PathProgramCache]: Analyzing trace with hash 860497752, now seen corresponding path program 168 times [2021-06-05 14:38:45,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:45,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475599035] [2021-06-05 14:38:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:45,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:45,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475599035] [2021-06-05 14:38:45,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475599035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:45,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438466873] [2021-06-05 14:38:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:45,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:45,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:46,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:46,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:46,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:46,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:46,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:46,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:38:46,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:46,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:46,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:46,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,584 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-05 14:38:46,584 INFO L628 ElimStorePlain]: treesize reduction 491, result has 19.4 percent of original size [2021-06-05 14:38:46,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:46,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:46,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:46,635 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:46,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:46,679 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:46,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:46,722 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:46,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:46,763 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:46,802 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:46,841 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:46,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:46,876 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 14:38:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438466873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:47,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:38:47,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321345855] [2021-06-05 14:38:47,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:47,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:47,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:47,005 INFO L87 Difference]: Start difference. First operand 88 states and 178 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:47,453 INFO L93 Difference]: Finished difference Result 148 states and 280 transitions. [2021-06-05 14:38:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:47,454 INFO L225 Difference]: With dead ends: 148 [2021-06-05 14:38:47,454 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:38:47,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:38:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2021-06-05 14:38:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-06-05 14:38:47,455 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 18 [2021-06-05 14:38:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:47,455 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-06-05 14:38:47,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-06-05 14:38:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:47,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:47,455 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:47,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6903 [2021-06-05 14:38:47,655 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:47,656 INFO L82 PathProgramCache]: Analyzing trace with hash 57973998, now seen corresponding path program 169 times [2021-06-05 14:38:47,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:47,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494127313] [2021-06-05 14:38:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494127313] [2021-06-05 14:38:47,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494127313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242464072] [2021-06-05 14:38:47,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:48,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:48,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:38:48,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:38:48,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:48,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:48,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:48,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:38:48,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:48,559 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:48,563 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:48,567 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:48,571 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:48,574 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,626 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:38:48,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:48,630 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:48,633 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:48,635 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:48,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:48,657 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:38:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242464072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:48,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:38:48,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435711347] [2021-06-05 14:38:48,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:48,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:48,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:48,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:48,732 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:49,186 INFO L93 Difference]: Finished difference Result 138 states and 274 transitions. [2021-06-05 14:38:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:49,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:49,187 INFO L225 Difference]: With dead ends: 138 [2021-06-05 14:38:49,187 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:38:49,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 577.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:38:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-06-05 14:38:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.065934065934066) internal successors, (188), 91 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 188 transitions. [2021-06-05 14:38:49,188 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 188 transitions. Word has length 18 [2021-06-05 14:38:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:49,188 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 188 transitions. [2021-06-05 14:38:49,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 188 transitions. [2021-06-05 14:38:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:49,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:49,188 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:49,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7013 [2021-06-05 14:38:49,389 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1914949070, now seen corresponding path program 170 times [2021-06-05 14:38:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:49,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420081372] [2021-06-05 14:38:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:49,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:49,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420081372] [2021-06-05 14:38:49,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420081372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:49,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005920555] [2021-06-05 14:38:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:49,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:49,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:49,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:50,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:50,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:38:50,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:50,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:50,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:50,219 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:38:50,223 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:50,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:50,232 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:38:50,237 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:50,240 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:50,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,295 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:38:50,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:50,298 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:50,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:50,304 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:50,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:50,326 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:38:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:50,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005920555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:50,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:50,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:38:50,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984145541] [2021-06-05 14:38:50,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:50,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:50,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:50,399 INFO L87 Difference]: Start difference. First operand 92 states and 188 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:50,796 INFO L93 Difference]: Finished difference Result 135 states and 268 transitions. [2021-06-05 14:38:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:50,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:50,797 INFO L225 Difference]: With dead ends: 135 [2021-06-05 14:38:50,797 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:38:50,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:38:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2021-06-05 14:38:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 92 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 190 transitions. [2021-06-05 14:38:50,798 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 190 transitions. Word has length 18 [2021-06-05 14:38:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:50,798 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 190 transitions. [2021-06-05 14:38:50,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 190 transitions. [2021-06-05 14:38:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:50,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:50,799 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:50,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7187 [2021-06-05 14:38:50,999 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1900733550, now seen corresponding path program 171 times [2021-06-05 14:38:50,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:50,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144098841] [2021-06-05 14:38:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:51,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:51,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144098841] [2021-06-05 14:38:51,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144098841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494261147] [2021-06-05 14:38:51,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:51,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:51,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:52,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:38:52,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:52,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,080 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:52,090 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:52,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:38:52,102 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:38:52,110 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,114 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:38:52,120 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,125 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:52,131 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,135 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:38:52,141 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,147 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:52,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:52,152 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,156 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:52,160 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,288 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 14:38:52,288 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-06-05 14:38:52,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:52,293 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:52,296 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:52,300 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:52,304 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:52,308 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:52,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:52,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:52,361 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 14:38:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:52,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494261147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:52,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:52,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:38:52,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824223716] [2021-06-05 14:38:52,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:52,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:52,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:52,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:52,537 INFO L87 Difference]: Start difference. First operand 93 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:53,048 INFO L93 Difference]: Finished difference Result 153 states and 292 transitions. [2021-06-05 14:38:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:53,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:53,049 INFO L225 Difference]: With dead ends: 153 [2021-06-05 14:38:53,049 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 14:38:53,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 713.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 14:38:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2021-06-05 14:38:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.066666666666667) internal successors, (186), 90 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 186 transitions. [2021-06-05 14:38:53,050 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 186 transitions. Word has length 18 [2021-06-05 14:38:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:53,050 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 186 transitions. [2021-06-05 14:38:53,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 186 transitions. [2021-06-05 14:38:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:53,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:53,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:53,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7319,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,251 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1327203748, now seen corresponding path program 172 times [2021-06-05 14:38:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:53,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068463807] [2021-06-05 14:38:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:53,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068463807] [2021-06-05 14:38:53,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068463807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299301207] [2021-06-05 14:38:53,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:53,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:53,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:53,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:53,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:53,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:53,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:53,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:53,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:53,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:53,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:53,773 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:38:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299301207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:53,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:38:53,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955885464] [2021-06-05 14:38:53,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:53,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:53,844 INFO L87 Difference]: Start difference. First operand 91 states and 186 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:54,031 INFO L93 Difference]: Finished difference Result 127 states and 248 transitions. [2021-06-05 14:38:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:54,032 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:38:54,032 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:38:54,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:38:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2021-06-05 14:38:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 92 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 190 transitions. [2021-06-05 14:38:54,033 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 190 transitions. Word has length 18 [2021-06-05 14:38:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:54,033 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 190 transitions. [2021-06-05 14:38:54,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 190 transitions. [2021-06-05 14:38:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:54,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:54,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:54,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7478 [2021-06-05 14:38:54,239 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1806488424, now seen corresponding path program 173 times [2021-06-05 14:38:54,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:54,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283556635] [2021-06-05 14:38:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:54,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:54,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283556635] [2021-06-05 14:38:54,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283556635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:54,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165368515] [2021-06-05 14:38:54,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:54,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:38:54,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:54,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:54,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:54,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:54,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:54,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:54,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:54,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:54,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:54,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:54,676 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:54,679 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:54,683 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:54,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:54,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:54,733 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:38:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:54,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165368515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:54,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:54,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:38:54,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719502746] [2021-06-05 14:38:54,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:54,901 INFO L87 Difference]: Start difference. First operand 93 states and 190 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:55,278 INFO L93 Difference]: Finished difference Result 134 states and 266 transitions. [2021-06-05 14:38:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:55,279 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:38:55,279 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:38:55,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:38:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-06-05 14:38:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 93 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 192 transitions. [2021-06-05 14:38:55,280 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 192 transitions. Word has length 18 [2021-06-05 14:38:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:55,280 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 192 transitions. [2021-06-05 14:38:55,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 192 transitions. [2021-06-05 14:38:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:55,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:55,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:55,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7519,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:55,497 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:55,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1953249070, now seen corresponding path program 174 times [2021-06-05 14:38:55,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:55,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885780261] [2021-06-05 14:38:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:55,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885780261] [2021-06-05 14:38:55,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885780261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679169432] [2021-06-05 14:38:55,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:55,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:38:55,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:55,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:55,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:55,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:55,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:55,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:55,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:55,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:56,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:56,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:38:56,008 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:56,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:56,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:38:56,018 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:56,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:56,064 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:38:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679169432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:56,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:38:56,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985867] [2021-06-05 14:38:56,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:56,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:56,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:56,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:56,224 INFO L87 Difference]: Start difference. First operand 94 states and 192 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:56,409 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-06-05 14:38:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:56,410 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:38:56,410 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:38:56,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:38:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-06-05 14:38:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 195 transitions. [2021-06-05 14:38:56,411 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 195 transitions. Word has length 18 [2021-06-05 14:38:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:56,411 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 195 transitions. [2021-06-05 14:38:56,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 195 transitions. [2021-06-05 14:38:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:56,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:56,411 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:56,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7546,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:56,612 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1931387830, now seen corresponding path program 175 times [2021-06-05 14:38:56,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:56,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549412460] [2021-06-05 14:38:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549412460] [2021-06-05 14:38:56,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549412460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341145234] [2021-06-05 14:38:56,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:57,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:57,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:57,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:57,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:57,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:57,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:57,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:38:57,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:57,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,566 INFO L628 ElimStorePlain]: treesize reduction 138, result has 31.0 percent of original size [2021-06-05 14:38:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:57,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:57,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:57,591 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:57,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:57,612 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:57,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:57,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:57,630 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-06-05 14:38:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:57,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341145234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:57,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:57,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:38:57,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984078316] [2021-06-05 14:38:57,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:57,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:57,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:57,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:57,702 INFO L87 Difference]: Start difference. First operand 95 states and 195 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:57,994 INFO L93 Difference]: Finished difference Result 122 states and 239 transitions. [2021-06-05 14:38:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:57,995 INFO L225 Difference]: With dead ends: 122 [2021-06-05 14:38:57,995 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:38:57,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:38:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2021-06-05 14:38:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 199 transitions. [2021-06-05 14:38:57,996 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 199 transitions. Word has length 18 [2021-06-05 14:38:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:57,996 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 199 transitions. [2021-06-05 14:38:57,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 199 transitions. [2021-06-05 14:38:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:57,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:57,996 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:58,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7576 [2021-06-05 14:38:58,205 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1332506502, now seen corresponding path program 176 times [2021-06-05 14:38:58,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:58,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958067388] [2021-06-05 14:38:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:58,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958067388] [2021-06-05 14:38:58,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958067388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996661484] [2021-06-05 14:38:58,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:58,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:58,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:58,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:38:58,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:58,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:58,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:58,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:58,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:58,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:38:58,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:58,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:58,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:59,021 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-06-05 14:38:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:59,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:59,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:59,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:38:59,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:59,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:59,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:38:59,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:59,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:59,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:59,084 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:38:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996661484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:59,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:38:59,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754332641] [2021-06-05 14:38:59,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:59,158 INFO L87 Difference]: Start difference. First operand 97 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,502 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 14:38:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:59,628 INFO L93 Difference]: Finished difference Result 125 states and 251 transitions. [2021-06-05 14:38:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:38:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:59,628 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:38:59,628 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:38:59,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 605.2ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:38:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2021-06-05 14:38:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-06-05 14:38:59,630 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-06-05 14:38:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:59,630 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-06-05 14:38:59,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-06-05 14:38:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:38:59,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:59,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:59,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7702,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,830 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:59,831 INFO L82 PathProgramCache]: Analyzing trace with hash -640416566, now seen corresponding path program 177 times [2021-06-05 14:38:59,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:59,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389836784] [2021-06-05 14:38:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389836784] [2021-06-05 14:38:59,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389836784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163404703] [2021-06-05 14:38:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:00,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:00,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:00,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:00,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:00,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:39:00,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:00,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,687 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 14:39:00,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:00,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:00,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:00,712 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:00,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:00,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:00,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:00,750 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:39:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:00,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163404703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:00,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:00,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:39:00,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213183202] [2021-06-05 14:39:00,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:39:00,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:39:00,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:00,823 INFO L87 Difference]: Start difference. First operand 98 states and 201 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:01,160 INFO L93 Difference]: Finished difference Result 122 states and 245 transitions. [2021-06-05 14:39:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:01,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:01,160 INFO L225 Difference]: With dead ends: 122 [2021-06-05 14:39:01,160 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:39:01,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:39:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-06-05 14:39:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-06-05 14:39:01,161 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-06-05 14:39:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:01,162 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-06-05 14:39:01,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-06-05 14:39:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:01,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:01,162 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:01,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7797 [2021-06-05 14:39:01,362 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1119701242, now seen corresponding path program 178 times [2021-06-05 14:39:01,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:01,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527724379] [2021-06-05 14:39:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:01,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:01,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527724379] [2021-06-05 14:39:01,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527724379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:01,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171907024] [2021-06-05 14:39:01,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:01,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:01,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:01,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:02,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:02,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:02,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:02,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:39:02,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,553 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 14:39:02,554 INFO L628 ElimStorePlain]: treesize reduction 356, result has 24.7 percent of original size [2021-06-05 14:39:02,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:02,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:02,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:02,604 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:02,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:02,653 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:02,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:02,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:02,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:02,737 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:02,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:02,778 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:02,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:02,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:02,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:02,852 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 14:39:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171907024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:02,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:39:02,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492910741] [2021-06-05 14:39:02,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:39:02,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:39:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:02,981 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:03,396 INFO L93 Difference]: Finished difference Result 121 states and 243 transitions. [2021-06-05 14:39:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:03,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:03,397 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:39:03,397 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:39:03,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 698.6ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:39:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2021-06-05 14:39:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-06-05 14:39:03,398 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-06-05 14:39:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:03,398 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-06-05 14:39:03,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-06-05 14:39:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:03,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:03,398 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:03,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7893 [2021-06-05 14:39:03,612 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1922224996, now seen corresponding path program 179 times [2021-06-05 14:39:03,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:03,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719666492] [2021-06-05 14:39:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:03,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:03,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719666492] [2021-06-05 14:39:03,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719666492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:03,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782205885] [2021-06-05 14:39:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:03,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:04,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:04,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:04,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:04,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:04,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:04,424 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:04,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:04,434 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:04,437 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:04,442 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:04,445 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:04,450 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:04,453 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,506 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:04,509 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:04,512 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:04,515 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:04,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:04,538 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:04,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782205885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:04,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:04,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:04,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874873026] [2021-06-05 14:39:04,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:04,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:04,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:04,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:04,614 INFO L87 Difference]: Start difference. First operand 98 states and 201 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:04,964 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:39:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:05,090 INFO L93 Difference]: Finished difference Result 127 states and 255 transitions. [2021-06-05 14:39:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:05,091 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:39:05,091 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:39:05,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:39:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2021-06-05 14:39:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-06-05 14:39:05,092 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-06-05 14:39:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:05,092 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-06-05 14:39:05,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-06-05 14:39:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:05,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:05,092 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:05,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8093,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:05,293 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash 399819232, now seen corresponding path program 180 times [2021-06-05 14:39:05,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:05,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491298439] [2021-06-05 14:39:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:05,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:05,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491298439] [2021-06-05 14:39:05,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491298439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:05,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839447452] [2021-06-05 14:39:05,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:05,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:05,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:06,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:06,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:06,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:06,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:06,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:06,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:06,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:06,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:06,184 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:06,188 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:06,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:06,196 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:06,199 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,251 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:06,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:06,254 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:06,257 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:06,260 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:06,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:06,282 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839447452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:06,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:06,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497284290] [2021-06-05 14:39:06,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:06,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:06,362 INFO L87 Difference]: Start difference. First operand 100 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:06,635 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:39:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:06,663 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-06-05 14:39:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:06,664 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:39:06,664 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:39:06,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:39:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-06-05 14:39:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 207 transitions. [2021-06-05 14:39:06,665 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 207 transitions. Word has length 18 [2021-06-05 14:39:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:06,665 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 207 transitions. [2021-06-05 14:39:06,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 207 transitions. [2021-06-05 14:39:06,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:06,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:06,665 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:06,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8239,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:06,866 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:06,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:06,866 INFO L82 PathProgramCache]: Analyzing trace with hash -79465444, now seen corresponding path program 181 times [2021-06-05 14:39:06,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:06,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569314724] [2021-06-05 14:39:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:07,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:07,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569314724] [2021-06-05 14:39:07,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569314724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:07,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516833960] [2021-06-05 14:39:07,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:07,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:07,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:07,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:07,875 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:07,882 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:07,887 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,892 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,897 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:07,902 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,907 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,911 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:07,915 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:07,921 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:07,925 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:08,026 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 14:39:08,027 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:39:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:08,030 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:08,034 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:08,037 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:08,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:08,041 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:08,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:08,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:08,081 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:39:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:08,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516833960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:08,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:08,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:08,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311919702] [2021-06-05 14:39:08,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:08,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:08,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:08,216 INFO L87 Difference]: Start difference. First operand 101 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:08,653 INFO L93 Difference]: Finished difference Result 142 states and 273 transitions. [2021-06-05 14:39:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:08,653 INFO L225 Difference]: With dead ends: 142 [2021-06-05 14:39:08,653 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:39:08,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 707.6ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:39:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-06-05 14:39:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-06-05 14:39:08,654 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-06-05 14:39:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:08,655 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-06-05 14:39:08,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-06-05 14:39:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:08,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:08,655 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:08,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8388 [2021-06-05 14:39:08,855 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:08,855 INFO L82 PathProgramCache]: Analyzing trace with hash 987564554, now seen corresponding path program 182 times [2021-06-05 14:39:08,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:08,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282485309] [2021-06-05 14:39:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:09,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:09,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282485309] [2021-06-05 14:39:09,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282485309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:09,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104371148] [2021-06-05 14:39:09,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:09,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:09,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:09,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:09,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:09,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:09,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:09,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:09,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:09,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:09,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:09,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:09,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:09,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:09,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:09,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:09,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:09,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:09,352 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:39:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:09,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104371148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:09,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:09,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:09,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49108817] [2021-06-05 14:39:09,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:09,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:09,428 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:09,906 INFO L93 Difference]: Finished difference Result 127 states and 254 transitions. [2021-06-05 14:39:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:09,906 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:39:09,906 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:39:09,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 606.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:39:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2021-06-05 14:39:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 207 transitions. [2021-06-05 14:39:09,908 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 207 transitions. Word has length 18 [2021-06-05 14:39:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:09,908 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 207 transitions. [2021-06-05 14:39:09,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 207 transitions. [2021-06-05 14:39:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:09,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:09,908 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:10,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8460 [2021-06-05 14:39:10,108 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash 508279878, now seen corresponding path program 183 times [2021-06-05 14:39:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:10,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258070486] [2021-06-05 14:39:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:10,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258070486] [2021-06-05 14:39:10,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258070486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469132714] [2021-06-05 14:39:10,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:10,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:39:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:10,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:10,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:10,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:10,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:10,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:10,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:10,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:10,575 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:10,578 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:10,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:10,616 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:39:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469132714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:10,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:10,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188313534] [2021-06-05 14:39:10,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:10,743 INFO L87 Difference]: Start difference. First operand 101 states and 207 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:10,969 INFO L93 Difference]: Finished difference Result 116 states and 230 transitions. [2021-06-05 14:39:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:10,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:10,970 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:39:10,970 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:39:10,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:39:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-06-05 14:39:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-06-05 14:39:10,971 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-06-05 14:39:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:10,971 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-06-05 14:39:10,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-06-05 14:39:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:10,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:10,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:11,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8494 [2021-06-05 14:39:11,172 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:11,172 INFO L82 PathProgramCache]: Analyzing trace with hash -26949924, now seen corresponding path program 184 times [2021-06-05 14:39:11,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:11,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980910991] [2021-06-05 14:39:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:11,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980910991] [2021-06-05 14:39:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980910991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530980818] [2021-06-05 14:39:11,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:11,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:11,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:11,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:11,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:11,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:11,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:11,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:11,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:11,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:11,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:11,654 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:11,657 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:11,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:11,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:11,704 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:39:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:11,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530980818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:11,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:11,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:11,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782492580] [2021-06-05 14:39:11,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:11,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:11,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:11,867 INFO L87 Difference]: Start difference. First operand 100 states and 205 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:12,678 INFO L93 Difference]: Finished difference Result 174 states and 334 transitions. [2021-06-05 14:39:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:39:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:12,678 INFO L225 Difference]: With dead ends: 174 [2021-06-05 14:39:12,679 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 14:39:12,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 962.8ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 14:39:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 103. [2021-06-05 14:39:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 14:39:12,680 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 14:39:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:12,680 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 14:39:12,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 14:39:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:12,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:12,680 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:12,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8517 [2021-06-05 14:39:12,881 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash 260313670, now seen corresponding path program 185 times [2021-06-05 14:39:12,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:12,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058618412] [2021-06-05 14:39:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:13,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:13,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058618412] [2021-06-05 14:39:13,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058618412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:13,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762310950] [2021-06-05 14:39:13,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:13,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:13,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:13,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:13,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:13,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:13,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:13,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:13,635 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:13,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:13,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:13,646 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:13,651 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:13,655 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:13,660 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:13,663 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,715 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:13,718 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:13,721 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:13,724 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:13,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:13,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:13,746 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:13,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762310950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:13,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:13,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:13,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146547342] [2021-06-05 14:39:13,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:13,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:13,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:13,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:13,822 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,121 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:39:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:14,155 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 14:39:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:14,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:14,155 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:39:14,155 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:39:14,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:39:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-06-05 14:39:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 103 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 216 transitions. [2021-06-05 14:39:14,156 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 216 transitions. Word has length 18 [2021-06-05 14:39:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:14,156 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 216 transitions. [2021-06-05 14:39:14,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 216 transitions. [2021-06-05 14:39:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:14,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:14,157 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:14,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8545 [2021-06-05 14:39:14,372 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1712609398, now seen corresponding path program 186 times [2021-06-05 14:39:14,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:14,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031854103] [2021-06-05 14:39:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:14,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:14,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031854103] [2021-06-05 14:39:14,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031854103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:14,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840205278] [2021-06-05 14:39:14,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:14,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:39:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:15,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:15,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:15,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,261 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:15,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:15,275 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:15,280 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,284 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:15,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:15,288 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,291 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:15,295 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,347 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:15,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:15,350 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:15,353 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:15,356 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:15,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:15,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:15,378 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:39:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:15,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840205278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:15,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:15,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:15,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852358877] [2021-06-05 14:39:15,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:15,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:15,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:15,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:15,458 INFO L87 Difference]: Start difference. First operand 104 states and 216 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,791 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:39:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:15,869 INFO L93 Difference]: Finished difference Result 128 states and 260 transitions. [2021-06-05 14:39:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:15,870 INFO L225 Difference]: With dead ends: 128 [2021-06-05 14:39:15,870 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:39:15,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:39:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-06-05 14:39:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 218 transitions. [2021-06-05 14:39:15,871 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 218 transitions. Word has length 18 [2021-06-05 14:39:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:15,871 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 218 transitions. [2021-06-05 14:39:15,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 218 transitions. [2021-06-05 14:39:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:15,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:15,871 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:16,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8619,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:16,077 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2103073222, now seen corresponding path program 187 times [2021-06-05 14:39:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:16,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493781198] [2021-06-05 14:39:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:16,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493781198] [2021-06-05 14:39:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493781198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409973062] [2021-06-05 14:39:16,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:16,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:16,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:16,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:16,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:16,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:16,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:16,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:17,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:17,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:17,009 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:17,014 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:17,020 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:17,026 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:17,031 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:17,036 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:17,042 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:17,046 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:17,050 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:17,055 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:17,060 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:17,063 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,157 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:39:17,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:17,161 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:17,165 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:17,168 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:17,172 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:17,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:17,212 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:39:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:17,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409973062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:17,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:17,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:17,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347128569] [2021-06-05 14:39:17,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:17,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:17,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:17,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:17,348 INFO L87 Difference]: Start difference. First operand 105 states and 218 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:17,555 INFO L93 Difference]: Finished difference Result 120 states and 241 transitions. [2021-06-05 14:39:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:17,555 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:39:17,555 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:39:17,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:39:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-06-05 14:39:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 14:39:17,557 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 14:39:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:17,557 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 14:39:17,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 14:39:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:17,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:17,557 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:17,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8758,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:17,760 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1124864076, now seen corresponding path program 188 times [2021-06-05 14:39:17,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:17,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154262435] [2021-06-05 14:39:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:17,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:17,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154262435] [2021-06-05 14:39:17,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154262435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:17,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93943823] [2021-06-05 14:39:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:17,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:18,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:18,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:18,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:18,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:18,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:18,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:18,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:18,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:18,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:18,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:18,245 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:18,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:18,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:18,266 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:39:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:18,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93943823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:18,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:18,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:18,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007104429] [2021-06-05 14:39:18,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:18,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:18,338 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:18,515 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-06-05 14:39:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:18,516 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:39:18,516 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:39:18,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:39:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-06-05 14:39:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 103 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 216 transitions. [2021-06-05 14:39:18,517 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 216 transitions. Word has length 18 [2021-06-05 14:39:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:18,517 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 216 transitions. [2021-06-05 14:39:18,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 216 transitions. [2021-06-05 14:39:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:18,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:18,517 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:18,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8842,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:18,718 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:18,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1604148752, now seen corresponding path program 189 times [2021-06-05 14:39:18,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:18,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607018239] [2021-06-05 14:39:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:18,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:18,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607018239] [2021-06-05 14:39:18,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607018239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:18,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818376283] [2021-06-05 14:39:18,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:18,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:39:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:18,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:18,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:19,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:19,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:19,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:19,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:19,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:19,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:19,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:19,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:19,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:19,191 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:19,194 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:19,198 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:19,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:19,245 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:39:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:19,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818376283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:19,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:19,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:19,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895220441] [2021-06-05 14:39:19,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:19,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:19,405 INFO L87 Difference]: Start difference. First operand 104 states and 216 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:19,605 INFO L93 Difference]: Finished difference Result 119 states and 239 transitions. [2021-06-05 14:39:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:19,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:19,606 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:39:19,606 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:39:19,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:39:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-06-05 14:39:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 14:39:19,607 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 14:39:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:19,607 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 14:39:19,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 14:39:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:19,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:19,608 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:19,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8868 [2021-06-05 14:39:19,808 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:19,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2139378554, now seen corresponding path program 190 times [2021-06-05 14:39:19,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:19,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778959724] [2021-06-05 14:39:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:19,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778959724] [2021-06-05 14:39:19,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778959724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:19,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625641666] [2021-06-05 14:39:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:20,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:20,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:20,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:20,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:20,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:20,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:20,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:20,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:20,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:20,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:20,316 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:20,319 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:20,323 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:20,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:20,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:20,371 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:39:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:20,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625641666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:20,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:20,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:20,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744188359] [2021-06-05 14:39:20,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:20,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:20,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:20,536 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:21,005 INFO L93 Difference]: Finished difference Result 134 states and 272 transitions. [2021-06-05 14:39:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:21,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:21,006 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:39:21,006 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:39:21,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:39:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-06-05 14:39:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0980392156862746) internal successors, (214), 102 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 214 transitions. [2021-06-05 14:39:21,007 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 214 transitions. Word has length 18 [2021-06-05 14:39:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:21,007 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 214 transitions. [2021-06-05 14:39:21,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 214 transitions. [2021-06-05 14:39:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:21,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:21,008 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:21,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8893,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:21,208 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2107431601, now seen corresponding path program 191 times [2021-06-05 14:39:21,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:21,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184447094] [2021-06-05 14:39:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:39:21,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:21,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184447094] [2021-06-05 14:39:21,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184447094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:21,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31966007] [2021-06-05 14:39:21,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:21,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:39:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:21,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:21,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:21,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:21,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,573 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 14:39:21,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:21,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:21,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:21,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:21,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:21,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:21,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:21,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:21,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:21,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:21,731 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:21,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:21,757 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:21,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:21,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:39:21,781 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:39:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:39:21,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31966007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:21,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:21,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:39:21,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244278017] [2021-06-05 14:39:21,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:21,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:21,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:21,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:21,808 INFO L87 Difference]: Start difference. First operand 103 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:21,971 INFO L93 Difference]: Finished difference Result 121 states and 248 transitions. [2021-06-05 14:39:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:21,971 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:39:21,971 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:39:21,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:39:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-06-05 14:39:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.08) internal successors, (208), 100 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 208 transitions. [2021-06-05 14:39:21,973 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 208 transitions. Word has length 18 [2021-06-05 14:39:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:21,973 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 208 transitions. [2021-06-05 14:39:21,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 208 transitions. [2021-06-05 14:39:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:21,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:21,973 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:22,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8930,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:22,173 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash -84628278, now seen corresponding path program 192 times [2021-06-05 14:39:22,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:22,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68817380] [2021-06-05 14:39:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:22,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:22,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68817380] [2021-06-05 14:39:22,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68817380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:22,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598823278] [2021-06-05 14:39:22,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:22,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:22,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:22,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:22,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:22,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:22,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:22,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:22,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:22,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:22,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:22,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:22,687 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:39:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:22,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598823278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:22,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:22,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:22,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071203361] [2021-06-05 14:39:22,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:22,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:22,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:22,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:22,761 INFO L87 Difference]: Start difference. First operand 101 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:23,069 INFO L93 Difference]: Finished difference Result 127 states and 256 transitions. [2021-06-05 14:39:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:23,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:23,069 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:39:23,069 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:39:23,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:39:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-06-05 14:39:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 103 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 214 transitions. [2021-06-05 14:39:23,070 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 214 transitions. Word has length 18 [2021-06-05 14:39:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:23,071 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 214 transitions. [2021-06-05 14:39:23,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 214 transitions. [2021-06-05 14:39:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:23,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:23,071 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:23,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8952 [2021-06-05 14:39:23,271 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash -563912954, now seen corresponding path program 193 times [2021-06-05 14:39:23,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:23,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45988684] [2021-06-05 14:39:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:23,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:23,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45988684] [2021-06-05 14:39:23,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45988684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:23,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423919879] [2021-06-05 14:39:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:23,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:23,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:23,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:23,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:23,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:23,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:23,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:23,728 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:23,731 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:23,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:23,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:23,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:23,777 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:167, output treesize:79 [2021-06-05 14:39:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423919879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:23,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:23,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014817094] [2021-06-05 14:39:23,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:23,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:23,908 INFO L87 Difference]: Start difference. First operand 104 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:24,281 INFO L93 Difference]: Finished difference Result 145 states and 280 transitions. [2021-06-05 14:39:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:24,282 INFO L225 Difference]: With dead ends: 145 [2021-06-05 14:39:24,282 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:39:24,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:39:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2021-06-05 14:39:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 102 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 212 transitions. [2021-06-05 14:39:24,283 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 212 transitions. Word has length 18 [2021-06-05 14:39:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:24,283 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 212 transitions. [2021-06-05 14:39:24,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 212 transitions. [2021-06-05 14:39:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:24,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:24,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8988,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:24,497 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1099142756, now seen corresponding path program 194 times [2021-06-05 14:39:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115679521] [2021-06-05 14:39:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:24,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:24,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115679521] [2021-06-05 14:39:24,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115679521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:24,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654662220] [2021-06-05 14:39:24,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:24,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:24,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:24,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:24,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:24,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:24,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:24,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:24,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:24,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:24,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:24,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:24,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:24,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:24,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:24,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:25,070 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 14:39:25,071 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.1 percent of original size [2021-06-05 14:39:25,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:25,075 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:25,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:25,078 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:25,081 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:25,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:25,085 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:25,088 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:25,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:25,092 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:25,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:25,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:39:25,150 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-06-05 14:39:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:25,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654662220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:25,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:25,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:25,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338256797] [2021-06-05 14:39:25,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:25,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:25,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:25,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:25,319 INFO L87 Difference]: Start difference. First operand 103 states and 212 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:25,519 INFO L93 Difference]: Finished difference Result 123 states and 246 transitions. [2021-06-05 14:39:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:25,520 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:39:25,520 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:39:25,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:39:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-06-05 14:39:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 102 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 212 transitions. [2021-06-05 14:39:25,521 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 212 transitions. Word has length 18 [2021-06-05 14:39:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:25,521 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 212 transitions. [2021-06-05 14:39:25,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 212 transitions. [2021-06-05 14:39:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:25,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:25,521 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:25,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9018 [2021-06-05 14:39:25,722 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:25,722 INFO L82 PathProgramCache]: Analyzing trace with hash -511397434, now seen corresponding path program 195 times [2021-06-05 14:39:25,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:25,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273981482] [2021-06-05 14:39:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:25,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:25,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273981482] [2021-06-05 14:39:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273981482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474012861] [2021-06-05 14:39:25,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:25,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:25,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:26,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:26,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:26,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:26,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:26,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:39:26,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:26,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:26,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:26,985 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:26,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:26,996 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:27,001 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:27,005 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:27,011 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:27,015 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:27,021 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:27,025 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:27,029 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:27,034 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:27,039 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:27,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:27,044 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,184 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:39:27,185 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:39:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:27,189 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:27,193 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:27,197 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:27,201 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:27,205 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:27,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:27,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:27,266 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 14:39:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:27,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474012861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:27,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:27,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226304736] [2021-06-05 14:39:27,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:27,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:27,462 INFO L87 Difference]: Start difference. First operand 103 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:28,174 INFO L93 Difference]: Finished difference Result 136 states and 276 transitions. [2021-06-05 14:39:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:39:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:28,174 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:39:28,174 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 14:39:28,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 925.7ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 14:39:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2021-06-05 14:39:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.087378640776699) internal successors, (215), 103 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 215 transitions. [2021-06-05 14:39:28,176 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 215 transitions. Word has length 18 [2021-06-05 14:39:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:28,176 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 215 transitions. [2021-06-05 14:39:28,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 215 transitions. [2021-06-05 14:39:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:28,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:28,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:28,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9052,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:28,376 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1106952796, now seen corresponding path program 196 times [2021-06-05 14:39:28,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:28,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485274658] [2021-06-05 14:39:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:28,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485274658] [2021-06-05 14:39:28,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485274658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883772242] [2021-06-05 14:39:28,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:28,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:28,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:28,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:29,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:29,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:29,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:29,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:29,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:29,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:29,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:29,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:29,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:29,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:29,280 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:29,283 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:29,286 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,339 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:29,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:29,342 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:29,345 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:29,348 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:29,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:29,370 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:29,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883772242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:29,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:29,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:39:29,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862716424] [2021-06-05 14:39:29,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:39:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:39:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:29,447 INFO L87 Difference]: Start difference. First operand 104 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,666 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 14:39:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:29,705 INFO L93 Difference]: Finished difference Result 127 states and 251 transitions. [2021-06-05 14:39:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:29,706 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:39:29,706 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:39:29,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:39:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-06-05 14:39:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-06-05 14:39:29,707 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 18 [2021-06-05 14:39:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:29,707 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-06-05 14:39:29,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-06-05 14:39:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:29,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:29,707 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:29,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9245 [2021-06-05 14:39:29,908 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash 75879832, now seen corresponding path program 197 times [2021-06-05 14:39:29,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:29,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665384150] [2021-06-05 14:39:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665384150] [2021-06-05 14:39:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665384150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069211524] [2021-06-05 14:39:30,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:30,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:30,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:30,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:30,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:30,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:30,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:30,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:30,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:30,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:30,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:30,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:30,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:30,851 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:30,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:30,856 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:30,859 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:30,862 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,918 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:30,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:30,924 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:30,927 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:30,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:30,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:30,949 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:31,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069211524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:31,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:31,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:39:31,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274623474] [2021-06-05 14:39:31,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:31,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:31,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:31,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:31,027 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:31,262 INFO L93 Difference]: Finished difference Result 125 states and 248 transitions. [2021-06-05 14:39:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:31,263 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:39:31,263 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:39:31,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:39:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-06-05 14:39:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 14:39:31,264 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 14:39:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:31,264 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 14:39:31,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 14:39:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:31,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:31,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:31,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9354 [2021-06-05 14:39:31,465 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:31,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1897043236, now seen corresponding path program 198 times [2021-06-05 14:39:31,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:31,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11632988] [2021-06-05 14:39:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:31,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:31,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11632988] [2021-06-05 14:39:31,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11632988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:31,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199848711] [2021-06-05 14:39:31,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:31,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:32,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:32,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:32,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:32,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:32,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:32,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,542 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,546 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,549 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,553 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:32,556 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:32,561 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:32,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:32,564 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,616 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:32,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:32,619 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:32,623 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:32,626 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:32,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:32,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:32,647 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:597, output treesize:52 [2021-06-05 14:39:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:32,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199848711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:32,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:32,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:39:32,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450213743] [2021-06-05 14:39:32,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:39:32,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:32,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:39:32,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:32,725 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,034 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:39:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:33,067 INFO L93 Difference]: Finished difference Result 123 states and 245 transitions. [2021-06-05 14:39:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:33,068 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:39:33,068 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:39:33,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:39:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-06-05 14:39:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 14:39:33,069 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 18 [2021-06-05 14:39:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:33,069 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 14:39:33,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 14:39:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:33,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:33,070 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:33,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9446,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:33,270 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:33,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1918639384, now seen corresponding path program 199 times [2021-06-05 14:39:33,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:33,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389645328] [2021-06-05 14:39:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:33,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:33,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389645328] [2021-06-05 14:39:33,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389645328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:33,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941210601] [2021-06-05 14:39:33,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:33,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:34,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:34,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:34,292 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:34,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:34,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:34,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:34,315 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:34,321 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,325 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,330 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,339 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:34,344 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:34,349 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,353 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,357 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,361 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,365 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,461 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:39:34,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:34,466 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:34,469 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:34,473 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:34,477 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:34,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:34,517 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 5 variables, input treesize:879, output treesize:79 [2021-06-05 14:39:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:34,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941210601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:34,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:34,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:39:34,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841050065] [2021-06-05 14:39:34,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:39:34,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:34,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:39:34,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:34,660 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:34,910 INFO L93 Difference]: Finished difference Result 123 states and 246 transitions. [2021-06-05 14:39:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:34,911 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:39:34,911 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:39:34,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:34,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:39:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-06-05 14:39:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-06-05 14:39:34,912 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-06-05 14:39:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:34,912 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-06-05 14:39:34,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-06-05 14:39:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:34,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:34,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:35,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9625,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:35,113 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1116115630, now seen corresponding path program 200 times [2021-06-05 14:39:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876139252] [2021-06-05 14:39:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:35,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:35,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876139252] [2021-06-05 14:39:35,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876139252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:35,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69520956] [2021-06-05 14:39:35,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:35,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:35,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:35,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:35,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:35,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:35,923 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:35,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,941 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,945 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:35,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:35,955 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:35,959 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,963 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:35,966 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:35,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:35,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:35,970 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,030 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:39:36,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:36,033 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:36,037 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:36,040 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:36,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:36,065 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:652, output treesize:62 [2021-06-05 14:39:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69520956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:36,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:36,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:36,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417549297] [2021-06-05 14:39:36,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:36,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:36,149 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,416 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 14:39:36,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:36,514 INFO L93 Difference]: Finished difference Result 134 states and 271 transitions. [2021-06-05 14:39:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:36,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:36,514 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:39:36,514 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:39:36,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:39:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2021-06-05 14:39:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 14:39:36,515 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 14:39:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:36,516 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 14:39:36,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 14:39:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:36,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:36,516 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:36,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9812,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:36,716 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash -856807438, now seen corresponding path program 201 times [2021-06-05 14:39:36,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:36,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599930457] [2021-06-05 14:39:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:36,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:36,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599930457] [2021-06-05 14:39:36,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599930457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:36,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66919698] [2021-06-05 14:39:36,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:36,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:36,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:36,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:37,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:37,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:37,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:37,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:37,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:37,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:37,662 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:37,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:37,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:37,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:37,678 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:37,682 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:37,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:37,686 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,737 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:37,740 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:37,744 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:37,746 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:37,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:37,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:37,768 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:37,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66919698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:37,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:37,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:37,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202213972] [2021-06-05 14:39:37,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:37,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:37,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:37,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:37,841 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:38,209 INFO L93 Difference]: Finished difference Result 131 states and 265 transitions. [2021-06-05 14:39:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:38,209 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:39:38,209 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:39:38,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:39:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2021-06-05 14:39:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 14:39:38,210 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 18 [2021-06-05 14:39:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:38,210 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 14:39:38,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 14:39:38,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:38,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:38,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:38,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9942 [2021-06-05 14:39:38,411 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1336092114, now seen corresponding path program 202 times [2021-06-05 14:39:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:38,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606064135] [2021-06-05 14:39:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:38,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:38,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606064135] [2021-06-05 14:39:38,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606064135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:38,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085396610] [2021-06-05 14:39:38,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:38,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:38,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:38,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:39,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:39,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:39,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:39,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,473 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:39,478 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,482 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,487 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,491 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:39,496 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:39,501 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:39,506 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:39,523 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:39,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:39,527 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,628 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 14:39:39,628 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:39:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:39,632 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:39,635 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:39,639 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:39,642 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:39,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:39,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:39,682 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:39:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085396610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:39,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:39,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247526365] [2021-06-05 14:39:39,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:39,813 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:40,206 INFO L93 Difference]: Finished difference Result 149 states and 289 transitions. [2021-06-05 14:39:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:40,206 INFO L225 Difference]: With dead ends: 149 [2021-06-05 14:39:40,206 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:39:40,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:39:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-06-05 14:39:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-06-05 14:39:40,208 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 18 [2021-06-05 14:39:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:40,208 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-06-05 14:39:40,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-06-05 14:39:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:40,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:40,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:40,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10127,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:40,408 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash -269062116, now seen corresponding path program 203 times [2021-06-05 14:39:40,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:40,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445580967] [2021-06-05 14:39:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:40,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:40,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445580967] [2021-06-05 14:39:40,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445580967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:40,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61161701] [2021-06-05 14:39:40,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:40,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:39:40,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:40,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:40,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:40,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:40,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:40,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:40,843 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:40,846 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:40,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:40,867 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 14:39:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:40,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61161701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:40,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:40,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:40,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864608512] [2021-06-05 14:39:40,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:40,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:40,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:40,941 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:41,211 INFO L93 Difference]: Finished difference Result 131 states and 265 transitions. [2021-06-05 14:39:41,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:41,212 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:39:41,212 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:39:41,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:39:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2021-06-05 14:39:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 14:39:41,213 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 18 [2021-06-05 14:39:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:41,213 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 14:39:41,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 14:39:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:41,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:41,213 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:41,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10217,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:41,414 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash -748346792, now seen corresponding path program 204 times [2021-06-05 14:39:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:41,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407386206] [2021-06-05 14:39:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:41,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:41,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407386206] [2021-06-05 14:39:41,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407386206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:41,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104864049] [2021-06-05 14:39:41,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:41,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:39:41,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:41,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:41,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:41,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:41,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:41,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:41,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:41,904 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:41,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:41,911 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:41,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:41,950 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:39:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:42,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104864049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:42,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:42,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713340973] [2021-06-05 14:39:42,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:42,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:42,086 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:42,417 INFO L93 Difference]: Finished difference Result 149 states and 289 transitions. [2021-06-05 14:39:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:42,417 INFO L225 Difference]: With dead ends: 149 [2021-06-05 14:39:42,417 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:39:42,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:39:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-06-05 14:39:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 14:39:42,419 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 14:39:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:42,419 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 14:39:42,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 14:39:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:42,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:42,419 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:42,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10239,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:42,619 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:42,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1283576594, now seen corresponding path program 205 times [2021-06-05 14:39:42,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:42,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329029422] [2021-06-05 14:39:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:42,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:42,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329029422] [2021-06-05 14:39:42,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329029422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:42,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292494463] [2021-06-05 14:39:42,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:42,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:43,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:43,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:43,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:43,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:43,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:43,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:43,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:43,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:43,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:43,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:43,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:43,166 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:39:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292494463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:43,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:43,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808909836] [2021-06-05 14:39:43,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:43,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:43,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:43,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:43,297 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:43,955 INFO L93 Difference]: Finished difference Result 181 states and 350 transitions. [2021-06-05 14:39:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:43,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:43,956 INFO L225 Difference]: With dead ends: 181 [2021-06-05 14:39:43,956 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:39:43,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:39:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2021-06-05 14:39:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 14:39:43,957 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-06-05 14:39:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:43,957 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 14:39:43,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 14:39:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:43,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:43,957 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:44,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10264 [2021-06-05 14:39:44,173 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash -996313000, now seen corresponding path program 206 times [2021-06-05 14:39:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790315519] [2021-06-05 14:39:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:44,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:44,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790315519] [2021-06-05 14:39:44,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790315519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330851555] [2021-06-05 14:39:44,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:44,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:45,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:45,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:45,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:45,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:45,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:45,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:45,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:45,118 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:45,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:45,125 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:45,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:45,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:45,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:45,136 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,188 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:45,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:45,191 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:45,195 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:45,197 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:45,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:45,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:45,219 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:45,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330851555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:45,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:45,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:45,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481718020] [2021-06-05 14:39:45,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:45,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:45,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:45,295 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,604 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 14:39:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:45,712 INFO L93 Difference]: Finished difference Result 137 states and 277 transitions. [2021-06-05 14:39:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:45,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:45,712 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:39:45,713 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:39:45,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:39:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2021-06-05 14:39:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-06-05 14:39:45,714 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 18 [2021-06-05 14:39:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:45,714 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-06-05 14:39:45,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-06-05 14:39:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:45,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:45,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:45,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10292 [2021-06-05 14:39:45,914 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:45,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1325731228, now seen corresponding path program 207 times [2021-06-05 14:39:45,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:45,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87938974] [2021-06-05 14:39:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:46,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:46,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87938974] [2021-06-05 14:39:46,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87938974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:46,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062015096] [2021-06-05 14:39:46,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:46,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:39:46,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:46,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:46,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:46,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:46,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:46,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:46,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:46,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:46,702 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:46,706 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:46,711 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:46,714 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:46,717 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:46,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:46,721 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,773 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:39:46,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:46,776 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:46,779 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:46,782 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:46,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:46,804 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:39:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062015096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:46,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:46,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:46,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763131347] [2021-06-05 14:39:46,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:46,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:46,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:46,877 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:47,267 INFO L93 Difference]: Finished difference Result 135 states and 269 transitions. [2021-06-05 14:39:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:47,267 INFO L225 Difference]: With dead ends: 135 [2021-06-05 14:39:47,267 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:39:47,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:39:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2021-06-05 14:39:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 14:39:47,269 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 18 [2021-06-05 14:39:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:47,269 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 14:39:47,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 14:39:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:47,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:47,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:47,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10391,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:47,469 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash 846446552, now seen corresponding path program 208 times [2021-06-05 14:39:47,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:47,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702792714] [2021-06-05 14:39:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:47,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:47,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702792714] [2021-06-05 14:39:47,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702792714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:47,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797518235] [2021-06-05 14:39:47,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:47,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:47,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:47,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:48,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:48,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:48,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:48,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:39:48,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:48,550 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:48,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,560 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:48,565 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,570 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,575 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:48,580 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:48,585 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,590 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:48,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:48,595 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,599 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,603 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:48,607 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,735 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 14:39:48,735 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-06-05 14:39:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:48,740 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:48,743 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:48,747 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:48,751 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:48,755 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:48,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:48,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:48,806 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 14:39:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:48,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797518235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:48,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:48,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:48,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207036498] [2021-06-05 14:39:48,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:48,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:48,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:48,977 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:49,341 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-06-05 14:39:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:49,342 INFO L225 Difference]: With dead ends: 152 [2021-06-05 14:39:49,342 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:39:49,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 625.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:39:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-06-05 14:39:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-05 14:39:49,343 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 18 [2021-06-05 14:39:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:49,343 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-05 14:39:49,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-05 14:39:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:49,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:49,343 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:49,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10463 [2021-06-05 14:39:49,544 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1913476550, now seen corresponding path program 209 times [2021-06-05 14:39:49,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:49,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054466703] [2021-06-05 14:39:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:49,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:49,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054466703] [2021-06-05 14:39:49,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054466703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:49,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235711135] [2021-06-05 14:39:49,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:49,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:49,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:49,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:49,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:49,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:49,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:49,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:50,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:50,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:50,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:50,027 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:50,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:50,048 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:39:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235711135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:50,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:50,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534487658] [2021-06-05 14:39:50,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:50,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:50,122 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:50,430 INFO L93 Difference]: Finished difference Result 134 states and 271 transitions. [2021-06-05 14:39:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:50,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:50,431 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:39:50,431 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:39:50,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:39:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-06-05 14:39:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 14:39:50,432 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 18 [2021-06-05 14:39:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:50,432 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 14:39:50,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 14:39:50,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:50,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:50,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:50,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10623 [2021-06-05 14:39:50,633 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:50,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1434191874, now seen corresponding path program 210 times [2021-06-05 14:39:50,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:50,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241991814] [2021-06-05 14:39:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:50,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241991814] [2021-06-05 14:39:50,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241991814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067582832] [2021-06-05 14:39:50,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:50,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:39:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:50,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:51,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:51,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:51,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:51,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:51,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:51,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:51,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:51,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:51,101 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:51,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:51,108 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:51,111 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:51,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:51,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:51,160 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 14:39:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:51,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067582832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:51,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:51,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:51,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48944775] [2021-06-05 14:39:51,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:51,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:51,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:51,329 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:51,547 INFO L93 Difference]: Finished difference Result 126 states and 252 transitions. [2021-06-05 14:39:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:51,548 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:39:51,548 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:39:51,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:39:51,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-06-05 14:39:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-06-05 14:39:51,549 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 18 [2021-06-05 14:39:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:51,549 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-06-05 14:39:51,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-06-05 14:39:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:51,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:51,550 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:51,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10650,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:51,765 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:51,766 INFO L82 PathProgramCache]: Analyzing trace with hash 898962072, now seen corresponding path program 211 times [2021-06-05 14:39:51,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:51,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22316823] [2021-06-05 14:39:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:51,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22316823] [2021-06-05 14:39:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22316823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698808465] [2021-06-05 14:39:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:52,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:52,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:52,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:52,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:52,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:52,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:52,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:52,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:52,276 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:52,279 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:52,283 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:52,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:52,321 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:39:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:52,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698808465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:52,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:52,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:52,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848296236] [2021-06-05 14:39:52,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:52,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:52,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:52,454 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:53,070 INFO L93 Difference]: Finished difference Result 165 states and 326 transitions. [2021-06-05 14:39:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:39:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:53,071 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:39:53,071 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:39:53,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 778.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:39:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 112. [2021-06-05 14:39:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 14:39:53,072 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-06-05 14:39:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:53,072 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 14:39:53,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 14:39:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:53,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:53,073 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10682 [2021-06-05 14:39:53,288 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1341254948, now seen corresponding path program 212 times [2021-06-05 14:39:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010775961] [2021-06-05 14:39:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:53,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010775961] [2021-06-05 14:39:53,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010775961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846609637] [2021-06-05 14:39:53,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:53,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:53,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:53,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:53,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:53,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:53,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:53,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:53,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:53,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:53,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:53,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:53,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:53,798 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 14:39:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846609637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:53,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:53,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983379262] [2021-06-05 14:39:53,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:53,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:53,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:53,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:53,872 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:54,137 INFO L93 Difference]: Finished difference Result 138 states and 280 transitions. [2021-06-05 14:39:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:54,137 INFO L225 Difference]: With dead ends: 138 [2021-06-05 14:39:54,137 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 14:39:54,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 14:39:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-06-05 14:39:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.087719298245614) internal successors, (238), 114 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 238 transitions. [2021-06-05 14:39:54,139 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 238 transitions. Word has length 18 [2021-06-05 14:39:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:54,139 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 238 transitions. [2021-06-05 14:39:54,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 238 transitions. [2021-06-05 14:39:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:54,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:54,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:54,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10711,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:54,339 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1820539624, now seen corresponding path program 213 times [2021-06-05 14:39:54,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:54,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032209514] [2021-06-05 14:39:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:54,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:54,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032209514] [2021-06-05 14:39:54,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032209514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:54,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913425455] [2021-06-05 14:39:54,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:54,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:39:54,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:54,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:54,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:54,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:54,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:54,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:54,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:54,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:54,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:54,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:54,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:54,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:54,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:54,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:54,883 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:39:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:55,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913425455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:55,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:55,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:55,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976135923] [2021-06-05 14:39:55,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:55,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:55,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:55,017 INFO L87 Difference]: Start difference. First operand 115 states and 238 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:55,611 INFO L93 Difference]: Finished difference Result 177 states and 347 transitions. [2021-06-05 14:39:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:55,611 INFO L225 Difference]: With dead ends: 177 [2021-06-05 14:39:55,611 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:39:55,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 737.0ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:39:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2021-06-05 14:39:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.103448275862069) internal successors, (244), 116 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 244 transitions. [2021-06-05 14:39:55,613 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 244 transitions. Word has length 18 [2021-06-05 14:39:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:55,613 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 244 transitions. [2021-06-05 14:39:55,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 244 transitions. [2021-06-05 14:39:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:55,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:55,613 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:55,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10737,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:55,814 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1939197870, now seen corresponding path program 214 times [2021-06-05 14:39:55,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:55,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073610529] [2021-06-05 14:39:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:55,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073610529] [2021-06-05 14:39:55,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073610529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80941289] [2021-06-05 14:39:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:56,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:56,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:56,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:56,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:56,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:56,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:56,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:56,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:56,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:56,282 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:56,285 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:56,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:56,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:56,323 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:39:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:56,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80941289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:56,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:56,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:39:56,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517609604] [2021-06-05 14:39:56,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:56,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:56,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:56,457 INFO L87 Difference]: Start difference. First operand 117 states and 244 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:57,131 INFO L93 Difference]: Finished difference Result 192 states and 375 transitions. [2021-06-05 14:39:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:57,132 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:39:57,132 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:39:57,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:39:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 117. [2021-06-05 14:39:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.103448275862069) internal successors, (244), 116 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 244 transitions. [2021-06-05 14:39:57,134 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 244 transitions. Word has length 18 [2021-06-05 14:39:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:57,134 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 244 transitions. [2021-06-05 14:39:57,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 244 transitions. [2021-06-05 14:39:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:57,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:57,134 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:57,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10764,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:57,334 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1768024104, now seen corresponding path program 215 times [2021-06-05 14:39:57,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:57,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830348899] [2021-06-05 14:39:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:57,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830348899] [2021-06-05 14:39:57,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830348899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744278729] [2021-06-05 14:39:57,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:57,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:57,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:57,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:58,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:39:58,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:39:58,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:58,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,293 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:39:58,299 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,313 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:58,323 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:58,328 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:39:58,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,338 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:58,342 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:58,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:39:58,346 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,456 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 14:39:58,456 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:39:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:39:58,460 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:39:58,464 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:39:58,468 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:39:58,471 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:58,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:58,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:58,517 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:39:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:58,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744278729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:58,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:58,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:39:58,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88984172] [2021-06-05 14:39:58,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:58,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:58,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:58,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:58,664 INFO L87 Difference]: Start difference. First operand 117 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:59,543 INFO L93 Difference]: Finished difference Result 221 states and 428 transitions. [2021-06-05 14:39:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:39:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:39:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:59,544 INFO L225 Difference]: With dead ends: 221 [2021-06-05 14:39:59,544 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:39:59,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1052.2ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:39:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2021-06-05 14:39:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1333333333333333) internal successors, (256), 120 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 256 transitions. [2021-06-05 14:39:59,545 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 256 transitions. Word has length 18 [2021-06-05 14:39:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:59,546 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 256 transitions. [2021-06-05 14:39:59,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 256 transitions. [2021-06-05 14:39:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:39:59,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:59,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:59,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10794 [2021-06-05 14:39:59,761 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2057091090, now seen corresponding path program 216 times [2021-06-05 14:39:59,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:59,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066129778] [2021-06-05 14:39:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:59,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066129778] [2021-06-05 14:39:59,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066129778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866770050] [2021-06-05 14:39:59,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:00,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:40:00,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:00,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:00,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:00,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:00,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:00,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:00,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:00,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:00,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:00,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:00,597 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:00,601 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:00,604 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:00,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:00,608 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:00,611 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,663 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:00,666 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:00,670 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:00,672 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:00,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:00,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:00,694 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:40:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:00,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866770050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:00,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:00,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:00,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229630354] [2021-06-05 14:40:00,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:00,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:00,768 INFO L87 Difference]: Start difference. First operand 121 states and 256 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:01,015 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:40:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:01,045 INFO L93 Difference]: Finished difference Result 143 states and 291 transitions. [2021-06-05 14:40:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:01,046 INFO L225 Difference]: With dead ends: 143 [2021-06-05 14:40:01,046 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:40:01,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 541.1ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:40:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-06-05 14:40:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 14:40:01,047 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 14:40:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:01,047 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 14:40:01,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 14:40:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:01,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:01,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:01,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10977 [2021-06-05 14:40:01,248 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 264953138, now seen corresponding path program 217 times [2021-06-05 14:40:01,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:01,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010857890] [2021-06-05 14:40:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:01,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:01,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010857890] [2021-06-05 14:40:01,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010857890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:01,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709644819] [2021-06-05 14:40:01,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:02,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:02,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:02,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:02,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:02,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:02,219 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:02,224 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:02,227 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:02,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:02,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:02,239 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:02,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:02,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,294 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:02,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:02,308 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:02,312 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:02,315 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:02,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:02,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:02,337 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:40:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:02,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709644819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:02,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:02,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:02,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191958608] [2021-06-05 14:40:02,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:02,410 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:02,650 INFO L93 Difference]: Finished difference Result 141 states and 288 transitions. [2021-06-05 14:40:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:02,650 INFO L225 Difference]: With dead ends: 141 [2021-06-05 14:40:02,650 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 14:40:02,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 14:40:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-06-05 14:40:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-06-05 14:40:02,652 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 18 [2021-06-05 14:40:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:02,652 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-06-05 14:40:02,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-06-05 14:40:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:02,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:02,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:02,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11082,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:02,852 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -214331538, now seen corresponding path program 218 times [2021-06-05 14:40:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:02,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672888736] [2021-06-05 14:40:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:03,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:03,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672888736] [2021-06-05 14:40:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672888736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:03,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962633299] [2021-06-05 14:40:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:03,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:03,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:04,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:04,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:04,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,315 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:04,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:04,327 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:40:04,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:04,339 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:04,345 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,350 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,355 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:04,360 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,365 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,369 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,374 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,378 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:04,383 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:04,387 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:04,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:04,391 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,518 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 14:40:04,518 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-06-05 14:40:04,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:04,522 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:04,526 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:04,530 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:04,534 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:04,538 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:04,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:04,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:04,591 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 14:40:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962633299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:04,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:04,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316992475] [2021-06-05 14:40:04,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:04,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:04,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:04,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:04,759 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:04,976 INFO L93 Difference]: Finished difference Result 141 states and 289 transitions. [2021-06-05 14:40:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:04,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:04,977 INFO L225 Difference]: With dead ends: 141 [2021-06-05 14:40:04,977 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:40:04,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 514.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:04,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:40:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-06-05 14:40:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.130081300813008) internal successors, (262), 123 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 262 transitions. [2021-06-05 14:40:04,978 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 262 transitions. Word has length 18 [2021-06-05 14:40:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:04,978 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 262 transitions. [2021-06-05 14:40:04,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 262 transitions. [2021-06-05 14:40:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:04,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:04,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:05,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11174,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:05,193 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 852698460, now seen corresponding path program 219 times [2021-06-05 14:40:05,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:05,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506418900] [2021-06-05 14:40:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:05,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:05,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506418900] [2021-06-05 14:40:05,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506418900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:05,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370050961] [2021-06-05 14:40:05,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:05,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:40:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:05,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:05,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:05,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:05,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:05,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:05,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:05,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:05,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:05,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:05,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:05,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:05,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:05,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:05,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:05,721 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:40:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370050961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:05,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:05,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792239833] [2021-06-05 14:40:05,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:05,793 INFO L87 Difference]: Start difference. First operand 124 states and 262 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:05,946 INFO L93 Difference]: Finished difference Result 141 states and 288 transitions. [2021-06-05 14:40:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:05,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:05,946 INFO L225 Difference]: With dead ends: 141 [2021-06-05 14:40:05,946 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 14:40:05,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 14:40:05,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-06-05 14:40:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-06-05 14:40:05,948 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 18 [2021-06-05 14:40:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:05,948 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-06-05 14:40:05,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-06-05 14:40:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:05,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:05,948 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:06,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11356 [2021-06-05 14:40:06,148 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash 373413784, now seen corresponding path program 220 times [2021-06-05 14:40:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:06,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155596657] [2021-06-05 14:40:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:06,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155596657] [2021-06-05 14:40:06,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155596657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739563489] [2021-06-05 14:40:06,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:06,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:06,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:06,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:06,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:06,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:06,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:06,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:06,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:06,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:06,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:06,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:06,659 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:06,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:06,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:06,701 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:40:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:06,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739563489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:06,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:06,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:06,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582738690] [2021-06-05 14:40:06,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:06,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:06,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:06,829 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:07,134 INFO L93 Difference]: Finished difference Result 167 states and 332 transitions. [2021-06-05 14:40:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:07,135 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:40:07,135 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 14:40:07,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 14:40:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2021-06-05 14:40:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 14:40:07,136 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 14:40:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:07,136 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 14:40:07,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 14:40:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:07,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:07,137 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:07,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11380,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:07,337 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash -161816018, now seen corresponding path program 221 times [2021-06-05 14:40:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:07,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739946809] [2021-06-05 14:40:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739946809] [2021-06-05 14:40:07,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739946809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349456666] [2021-06-05 14:40:07,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:07,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:40:07,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:07,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:07,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:07,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:07,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:07,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:07,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:07,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:07,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:07,780 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:07,783 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:07,787 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:07,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:07,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:07,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:07,830 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:40:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349456666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:07,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:07,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412462562] [2021-06-05 14:40:07,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:07,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:07,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:07,959 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:08,174 INFO L93 Difference]: Finished difference Result 145 states and 298 transitions. [2021-06-05 14:40:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:08,174 INFO L225 Difference]: With dead ends: 145 [2021-06-05 14:40:08,174 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:40:08,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:40:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2021-06-05 14:40:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.130081300813008) internal successors, (262), 123 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 262 transitions. [2021-06-05 14:40:08,176 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 262 transitions. Word has length 18 [2021-06-05 14:40:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:08,176 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 262 transitions. [2021-06-05 14:40:08,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 262 transitions. [2021-06-05 14:40:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:08,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:08,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:08,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11412 [2021-06-05 14:40:08,392 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1892934258, now seen corresponding path program 222 times [2021-06-05 14:40:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:08,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157713679] [2021-06-05 14:40:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:08,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:08,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157713679] [2021-06-05 14:40:08,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157713679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:08,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400471330] [2021-06-05 14:40:08,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:08,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:40:08,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:08,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:08,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:08,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:08,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:08,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:08,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:08,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:08,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:08,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:08,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:08,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:08,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:08,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:08,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:08,904 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 14:40:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:08,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400471330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:08,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:08,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:08,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13498276] [2021-06-05 14:40:08,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:08,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:08,979 INFO L87 Difference]: Start difference. First operand 124 states and 262 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:09,232 INFO L93 Difference]: Finished difference Result 150 states and 310 transitions. [2021-06-05 14:40:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:09,233 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:40:09,233 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 14:40:09,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 14:40:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2021-06-05 14:40:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-06-05 14:40:09,234 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 18 [2021-06-05 14:40:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:09,234 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-06-05 14:40:09,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-06-05 14:40:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:09,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:09,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:09,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11435,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:09,435 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1413649582, now seen corresponding path program 223 times [2021-06-05 14:40:09,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:09,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276141548] [2021-06-05 14:40:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:09,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:09,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276141548] [2021-06-05 14:40:09,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276141548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:09,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111342008] [2021-06-05 14:40:09,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:09,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:09,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:09,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:09,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:09,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:09,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:09,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:09,960 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:09,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:09,967 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:09,970 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:09,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:09,973 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:10,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:10,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:10,023 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:40:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111342008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:10,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:10,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:10,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206816329] [2021-06-05 14:40:10,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:10,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:10,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:10,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:10,188 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:10,396 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-06-05 14:40:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:10,397 INFO L225 Difference]: With dead ends: 142 [2021-06-05 14:40:10,397 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:40:10,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:40:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-06-05 14:40:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-06-05 14:40:10,398 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 18 [2021-06-05 14:40:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:10,398 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-06-05 14:40:10,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-06-05 14:40:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:10,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:10,398 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:10,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11463 [2021-06-05 14:40:10,599 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 878419780, now seen corresponding path program 224 times [2021-06-05 14:40:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:10,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240598027] [2021-06-05 14:40:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:10,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:10,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240598027] [2021-06-05 14:40:10,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240598027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:10,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705929573] [2021-06-05 14:40:10,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:10,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:10,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:10,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:11,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:11,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:11,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:11,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:11,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:11,199 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:11,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:11,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:11,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:11,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:11,266 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:11,269 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:11,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:11,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:11,319 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:40:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705929573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:11,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:11,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:40:11,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392618820] [2021-06-05 14:40:11,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:40:11,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:40:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:11,501 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:11,871 INFO L93 Difference]: Finished difference Result 155 states and 322 transitions. [2021-06-05 14:40:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:11,872 INFO L225 Difference]: With dead ends: 155 [2021-06-05 14:40:11,872 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 14:40:11,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 14:40:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2021-06-05 14:40:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 14:40:11,873 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 14:40:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:11,873 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 14:40:11,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 14:40:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:11,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:11,874 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:12,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11487 [2021-06-05 14:40:12,074 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1466165102, now seen corresponding path program 225 times [2021-06-05 14:40:12,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:12,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738366034] [2021-06-05 14:40:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:12,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:12,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738366034] [2021-06-05 14:40:12,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738366034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:12,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410761635] [2021-06-05 14:40:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:12,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:40:12,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:12,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:13,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:13,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:13,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:13,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:13,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,124 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,129 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,134 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,138 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:13,143 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:13,149 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:13,154 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:13,158 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,269 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 14:40:13,270 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:40:13,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:13,274 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:13,278 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:13,282 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:13,285 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:13,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:13,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:13,337 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:40:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410761635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:13,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:40:13,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882960814] [2021-06-05 14:40:13,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:13,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:13,510 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:14,375 INFO L93 Difference]: Finished difference Result 229 states and 448 transitions. [2021-06-05 14:40:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:40:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:14,375 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:40:14,375 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:40:14,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1065.6ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:40:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 125. [2021-06-05 14:40:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-06-05 14:40:14,377 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-06-05 14:40:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:14,377 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-06-05 14:40:14,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-06-05 14:40:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:14,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:14,377 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:14,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11533 [2021-06-05 14:40:14,578 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:14,578 INFO L82 PathProgramCache]: Analyzing trace with hash -219494372, now seen corresponding path program 226 times [2021-06-05 14:40:14,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:14,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536616026] [2021-06-05 14:40:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:14,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536616026] [2021-06-05 14:40:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536616026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455980680] [2021-06-05 14:40:14,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:14,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:14,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:15,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:15,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:15,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:15,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:15,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:15,079 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:15,082 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:15,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:15,104 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:40:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455980680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:15,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:15,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155888887] [2021-06-05 14:40:15,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:15,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:15,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:15,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:15,177 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:15,355 INFO L93 Difference]: Finished difference Result 144 states and 294 transitions. [2021-06-05 14:40:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:15,356 INFO L225 Difference]: With dead ends: 144 [2021-06-05 14:40:15,356 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:40:15,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:40:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-06-05 14:40:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 272 transitions. [2021-06-05 14:40:15,357 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 272 transitions. Word has length 18 [2021-06-05 14:40:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:15,358 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 272 transitions. [2021-06-05 14:40:15,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 272 transitions. [2021-06-05 14:40:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:15,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:15,358 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:15,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11717,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:15,558 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash -698779048, now seen corresponding path program 227 times [2021-06-05 14:40:15,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:15,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955672537] [2021-06-05 14:40:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:15,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955672537] [2021-06-05 14:40:15,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955672537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831354477] [2021-06-05 14:40:15,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:15,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:40:15,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:15,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:16,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:16,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:16,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:16,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:16,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:16,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:16,070 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:16,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:16,076 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:16,080 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:16,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:16,119 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:40:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831354477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:16,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220066578] [2021-06-05 14:40:16,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:16,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:16,250 INFO L87 Difference]: Start difference. First operand 129 states and 272 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:16,628 INFO L93 Difference]: Finished difference Result 170 states and 338 transitions. [2021-06-05 14:40:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:16,629 INFO L225 Difference]: With dead ends: 170 [2021-06-05 14:40:16,629 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:40:16,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 585.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:40:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2021-06-05 14:40:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 270 transitions. [2021-06-05 14:40:16,630 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 270 transitions. Word has length 18 [2021-06-05 14:40:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:16,630 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 270 transitions. [2021-06-05 14:40:16,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 270 transitions. [2021-06-05 14:40:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:16,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:16,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:16,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11746,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:16,831 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1234008850, now seen corresponding path program 228 times [2021-06-05 14:40:16,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:16,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969464825] [2021-06-05 14:40:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969464825] [2021-06-05 14:40:16,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969464825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812018681] [2021-06-05 14:40:16,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:17,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:40:17,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:17,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:17,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:17,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:17,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:17,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:17,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:17,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:17,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:17,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:17,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:17,337 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:17,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:17,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:17,377 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:40:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:17,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812018681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:17,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:17,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:17,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884408330] [2021-06-05 14:40:17,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:17,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:17,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:17,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:17,513 INFO L87 Difference]: Start difference. First operand 128 states and 270 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:17,729 INFO L93 Difference]: Finished difference Result 148 states and 304 transitions. [2021-06-05 14:40:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:17,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:17,730 INFO L225 Difference]: With dead ends: 148 [2021-06-05 14:40:17,730 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 14:40:17,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 14:40:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2021-06-05 14:40:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-06-05 14:40:17,731 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 18 [2021-06-05 14:40:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:17,731 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-06-05 14:40:17,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-06-05 14:40:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:17,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:17,732 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:17,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11775 [2021-06-05 14:40:17,948 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash -646263528, now seen corresponding path program 229 times [2021-06-05 14:40:17,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:17,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801115047] [2021-06-05 14:40:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801115047] [2021-06-05 14:40:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801115047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264726050] [2021-06-05 14:40:18,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:18,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:18,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:18,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:19,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:19,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:19,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:19,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:19,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:19,036 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:19,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,047 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:19,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,058 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,062 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,067 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,071 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,075 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:19,080 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,199 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 14:40:19,199 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:40:19,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:19,203 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:19,207 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:19,211 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:19,214 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:19,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:19,262 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:40:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264726050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:19,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:40:19,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9475394] [2021-06-05 14:40:19,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:40:19,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:19,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:40:19,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:19,409 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:20,223 INFO L93 Difference]: Finished difference Result 231 states and 452 transitions. [2021-06-05 14:40:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:40:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:20,224 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:40:20,224 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:40:20,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1060.5ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:40:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2021-06-05 14:40:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-06-05 14:40:20,226 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 18 [2021-06-05 14:40:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:20,226 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-06-05 14:40:20,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-06-05 14:40:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:20,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:20,226 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:20,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11806,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,442 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 393972270, now seen corresponding path program 230 times [2021-06-05 14:40:20,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:20,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938398193] [2021-06-05 14:40:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:20,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938398193] [2021-06-05 14:40:20,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938398193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223494859] [2021-06-05 14:40:20,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:20,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:21,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:21,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:21,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:21,371 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:21,377 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:21,383 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,388 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,392 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:21,397 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,401 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:21,407 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:21,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:21,412 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:21,415 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,527 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 14:40:21,528 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:40:21,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:21,532 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:21,536 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:21,540 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:21,543 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:21,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:21,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:21,590 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:40:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:21,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223494859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:21,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:21,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:40:21,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195379921] [2021-06-05 14:40:21,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:40:21,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:21,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:40:21,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:21,769 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,092 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 14:40:22,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:22,165 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-06-05 14:40:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:22,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:22,166 INFO L225 Difference]: With dead ends: 170 [2021-06-05 14:40:22,166 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:40:22,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:40:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2021-06-05 14:40:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 14:40:22,167 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 14:40:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:22,167 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 14:40:22,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 14:40:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:22,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:22,168 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:22,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11888 [2021-06-05 14:40:22,368 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 497747466, now seen corresponding path program 231 times [2021-06-05 14:40:22,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:22,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392756539] [2021-06-05 14:40:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:22,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392756539] [2021-06-05 14:40:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392756539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937595477] [2021-06-05 14:40:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:22,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:23,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:23,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:23,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,212 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:23,217 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:23,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:23,227 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,242 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:23,246 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:23,250 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,254 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,306 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:23,309 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:23,312 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:23,315 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:23,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:23,337 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:40:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:23,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937595477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:23,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:23,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:40:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004877727] [2021-06-05 14:40:23,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:40:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:40:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:23,418 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:23,744 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 14:40:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:23,866 INFO L93 Difference]: Finished difference Result 166 states and 344 transitions. [2021-06-05 14:40:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:40:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:23,866 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:40:23,866 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:40:23,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:40:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-06-05 14:40:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 14:40:23,868 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 14:40:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:23,868 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 14:40:23,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 14:40:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:23,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:23,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:24,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12021,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,073 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash -533325498, now seen corresponding path program 232 times [2021-06-05 14:40:24,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:24,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293514126] [2021-06-05 14:40:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:24,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293514126] [2021-06-05 14:40:24,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293514126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202707210] [2021-06-05 14:40:24,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:24,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:24,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:25,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:25,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:25,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:25,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:25,264 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:25,269 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,277 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:25,282 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,285 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,289 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,292 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:25,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:25,297 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:25,300 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,353 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:25,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:25,356 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:25,359 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:25,362 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:25,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:25,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:25,384 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:40:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202707210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:25,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:25,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:40:25,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81221249] [2021-06-05 14:40:25,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:40:25,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:40:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:25,458 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,774 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:40:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:25,802 INFO L93 Difference]: Finished difference Result 155 states and 317 transitions. [2021-06-05 14:40:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:25,802 INFO L225 Difference]: With dead ends: 155 [2021-06-05 14:40:25,802 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 14:40:25,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 14:40:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2021-06-05 14:40:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 14:40:25,804 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 14:40:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:25,804 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 14:40:25,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 14:40:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:25,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:25,804 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:26,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12122,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:26,004 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1788718730, now seen corresponding path program 233 times [2021-06-05 14:40:26,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:26,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359448056] [2021-06-05 14:40:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:26,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:26,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359448056] [2021-06-05 14:40:26,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359448056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:26,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673968965] [2021-06-05 14:40:26,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:26,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:26,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:26,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:26,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:26,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:26,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:26,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:26,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:26,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:26,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:26,912 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,916 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,920 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,924 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,928 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,931 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:26,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:26,936 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,939 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:26,943 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:26,995 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:26,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:26,998 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:27,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:27,001 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:27,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:27,004 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:27,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:27,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:27,026 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:40:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:27,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673968965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:27,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:27,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:40:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742315814] [2021-06-05 14:40:27,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:40:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:40:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:27,102 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:27,505 INFO L93 Difference]: Finished difference Result 154 states and 316 transitions. [2021-06-05 14:40:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:27,505 INFO L225 Difference]: With dead ends: 154 [2021-06-05 14:40:27,505 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:40:27,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:40:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2021-06-05 14:40:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 14:40:27,507 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 14:40:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:27,507 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 14:40:27,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 14:40:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:27,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:27,507 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:27,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12265,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:27,707 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1309434054, now seen corresponding path program 234 times [2021-06-05 14:40:27,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:27,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749062286] [2021-06-05 14:40:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:27,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749062286] [2021-06-05 14:40:27,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749062286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064968322] [2021-06-05 14:40:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:27,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:27,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:27,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:27,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:29,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:29,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:29,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:29,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,178 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,182 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:29,188 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:29,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:29,199 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,204 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,209 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,213 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:29,218 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:29,223 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:40:29,229 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,233 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:29,237 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,365 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 14:40:29,366 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 14:40:29,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:29,370 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:29,374 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:29,378 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:29,381 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:29,385 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:29,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:29,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:29,437 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 14:40:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:29,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064968322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:29,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:29,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:40:29,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668355668] [2021-06-05 14:40:29,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:40:29,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:40:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:29,608 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,742 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-05 14:40:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:30,151 INFO L93 Difference]: Finished difference Result 157 states and 323 transitions. [2021-06-05 14:40:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:30,151 INFO L225 Difference]: With dead ends: 157 [2021-06-05 14:40:30,151 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:40:30,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 793.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:40:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2021-06-05 14:40:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 14:40:30,153 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 14:40:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:30,153 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 14:40:30,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 14:40:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:30,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:30,153 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:30,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12364,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:30,353 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash 506910300, now seen corresponding path program 235 times [2021-06-05 14:40:30,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:30,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026853730] [2021-06-05 14:40:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:30,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:30,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026853730] [2021-06-05 14:40:30,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026853730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:30,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233095301] [2021-06-05 14:40:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:31,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:31,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:31,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,363 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:31,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:31,373 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,377 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,380 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:31,385 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:31,390 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,393 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:31,396 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:31,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:31,400 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,457 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:31,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:31,460 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:31,463 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:31,466 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:31,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:31,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:31,488 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:40:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233095301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:31,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:31,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352354816] [2021-06-05 14:40:31,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:31,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:31,561 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:31,872 INFO L93 Difference]: Finished difference Result 158 states and 323 transitions. [2021-06-05 14:40:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:31,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:31,872 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:40:31,873 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 14:40:31,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 14:40:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2021-06-05 14:40:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 14:40:31,874 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 14:40:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:31,874 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 14:40:31,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 14:40:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:31,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:31,874 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:32,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12509,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:32,075 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:32,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1466012768, now seen corresponding path program 236 times [2021-06-05 14:40:32,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:32,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661154243] [2021-06-05 14:40:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:32,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:32,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661154243] [2021-06-05 14:40:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661154243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259984518] [2021-06-05 14:40:32,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:32,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:32,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:32,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:32,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:32,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:32,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:32,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:32,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:32,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:32,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:32,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:32,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:32,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:32,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:32,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:33,000 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:33,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:33,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:33,005 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:33,009 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:33,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:33,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:33,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:33,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:33,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:33,022 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:33,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:33,030 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:33,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:33,036 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,090 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:33,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:33,094 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:33,097 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:33,100 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:33,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:33,123 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:40:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259984518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:33,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:33,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072804988] [2021-06-05 14:40:33,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:33,198 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:33,579 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-06-05 14:40:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:33,580 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:40:33,580 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:40:33,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:40:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-06-05 14:40:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 14:40:33,581 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 14:40:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:33,582 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 14:40:33,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 14:40:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:33,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:33,582 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:33,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12717,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:33,782 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1945297444, now seen corresponding path program 237 times [2021-06-05 14:40:33,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:33,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34085985] [2021-06-05 14:40:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34085985] [2021-06-05 14:40:33,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34085985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102898319] [2021-06-05 14:40:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:34,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:34,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:34,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:34,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:34,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:34,943 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:40:34,948 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,953 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,958 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,962 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:34,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,972 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,977 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:34,987 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:34,993 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:34,997 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:35,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:35,003 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:35,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:35,007 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,135 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 14:40:35,135 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 14:40:35,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:35,139 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:35,143 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:35,147 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:35,150 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:35,154 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:35,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:35,206 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 14:40:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:35,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102898319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:35,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:35,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:35,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679987438] [2021-06-05 14:40:35,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:35,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:35,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:35,370 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:35,735 INFO L93 Difference]: Finished difference Result 178 states and 356 transitions. [2021-06-05 14:40:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:35,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:35,736 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:40:35,736 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 14:40:35,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 14:40:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2021-06-05 14:40:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 14:40:35,738 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 14:40:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:35,738 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 14:40:35,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 14:40:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:35,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:35,738 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:35,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12877,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,938 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash -878267446, now seen corresponding path program 238 times [2021-06-05 14:40:35,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:35,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208764268] [2021-06-05 14:40:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208764268] [2021-06-05 14:40:36,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208764268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572800809] [2021-06-05 14:40:36,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:36,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:36,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:36,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:36,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:36,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:36,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:36,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:36,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:36,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:36,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:36,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:36,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:36,372 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:36,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:36,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:36,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:36,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:36,395 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:40:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572800809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:36,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:36,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032849105] [2021-06-05 14:40:36,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:36,467 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:36,743 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-06-05 14:40:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:36,744 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:40:36,744 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:40:36,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:40:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-06-05 14:40:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 14:40:36,745 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 14:40:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:36,745 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 14:40:36,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 14:40:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:36,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:36,745 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:36,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13166,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:36,946 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:36,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1357552122, now seen corresponding path program 239 times [2021-06-05 14:40:36,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:36,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809381903] [2021-06-05 14:40:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809381903] [2021-06-05 14:40:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809381903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720547960] [2021-06-05 14:40:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:37,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:40:37,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:37,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:37,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:37,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:37,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:37,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:37,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:37,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:37,369 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,518 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 14:40:37,518 INFO L628 ElimStorePlain]: treesize reduction 30, result has 84.8 percent of original size [2021-06-05 14:40:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:37,522 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:37,525 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:37,529 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:37,532 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:37,536 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:37,539 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:37,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:40:37,600 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 14:40:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720547960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:37,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:37,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266966646] [2021-06-05 14:40:37,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:37,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:37,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:37,767 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:38,093 INFO L93 Difference]: Finished difference Result 178 states and 356 transitions. [2021-06-05 14:40:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:38,094 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:40:38,094 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 14:40:38,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 14:40:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2021-06-05 14:40:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 14:40:38,095 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 14:40:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:38,095 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 14:40:38,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 14:40:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:38,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:38,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:38,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13184 [2021-06-05 14:40:38,296 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1892781924, now seen corresponding path program 240 times [2021-06-05 14:40:38,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:38,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581782360] [2021-06-05 14:40:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:38,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:38,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581782360] [2021-06-05 14:40:38,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581782360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:38,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22001798] [2021-06-05 14:40:38,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:38,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:40:38,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:38,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:38,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:38,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:38,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:38,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:38,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:38,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:38,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:38,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:38,739 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:38,743 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,876 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-05 14:40:38,876 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.4 percent of original size [2021-06-05 14:40:38,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:38,880 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:38,884 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:38,887 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:38,891 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:38,894 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:38,898 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:38,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:38,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:40:38,954 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 3 variables, input treesize:272, output treesize:125 [2021-06-05 14:40:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22001798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:39,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:39,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:39,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41750341] [2021-06-05 14:40:39,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:39,120 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:39,692 INFO L93 Difference]: Finished difference Result 210 states and 417 transitions. [2021-06-05 14:40:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:40:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:39,693 INFO L225 Difference]: With dead ends: 210 [2021-06-05 14:40:39,693 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 14:40:39,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 14:40:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 132. [2021-06-05 14:40:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1374045801526718) internal successors, (280), 131 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 280 transitions. [2021-06-05 14:40:39,694 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 280 transitions. Word has length 18 [2021-06-05 14:40:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:39,694 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 280 transitions. [2021-06-05 14:40:39,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 280 transitions. [2021-06-05 14:40:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:39,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:39,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:39,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13212 [2021-06-05 14:40:39,895 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:39,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1605518330, now seen corresponding path program 241 times [2021-06-05 14:40:39,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:39,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560696876] [2021-06-05 14:40:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:40,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560696876] [2021-06-05 14:40:40,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560696876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148060610] [2021-06-05 14:40:40,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:40,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:40,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:40,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:40,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:40,863 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,866 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,870 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:40,879 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,883 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:40,887 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:40,895 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:40,900 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:40,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:40,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,956 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:40,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:40,959 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:40,962 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:40,965 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:40,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:40,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:40,987 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:40:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148060610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:41,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:41,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046147282] [2021-06-05 14:40:41,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:41,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:41,062 INFO L87 Difference]: Start difference. First operand 132 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,364 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:40:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:41,461 INFO L93 Difference]: Finished difference Result 162 states and 336 transitions. [2021-06-05 14:40:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:40:41,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:41,462 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:40:41,462 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:40:41,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:40:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-06-05 14:40:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 14:40:41,463 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 14:40:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:41,463 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 14:40:41,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 14:40:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:41,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:41,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:41,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13236 [2021-06-05 14:40:41,664 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:41,664 INFO L82 PathProgramCache]: Analyzing trace with hash 716525898, now seen corresponding path program 242 times [2021-06-05 14:40:41,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:41,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64862048] [2021-06-05 14:40:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64862048] [2021-06-05 14:40:41,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64862048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562737726] [2021-06-05 14:40:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:41,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:42,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:42,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:42,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:42,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:42,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,660 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:42,669 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,673 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:42,681 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,685 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:42,688 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:42,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:42,692 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,745 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:42,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:42,748 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:42,751 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:42,754 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:42,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:42,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:42,776 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:40:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562737726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:42,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:42,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:42,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701318952] [2021-06-05 14:40:42,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:42,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:42,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:42,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:42,857 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:43,219 INFO L93 Difference]: Finished difference Result 159 states and 330 transitions. [2021-06-05 14:40:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:43,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:43,219 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:40:43,219 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:40:43,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:40:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2021-06-05 14:40:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 14:40:43,221 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 14:40:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:43,221 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 14:40:43,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 14:40:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:43,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:43,221 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:43,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13455 [2021-06-05 14:40:43,433 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 237241222, now seen corresponding path program 243 times [2021-06-05 14:40:43,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:43,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131788919] [2021-06-05 14:40:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:43,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:43,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131788919] [2021-06-05 14:40:43,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131788919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084346876] [2021-06-05 14:40:43,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:43,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:40:43,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:44,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:40:44,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:40:44,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:44,455 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,465 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,469 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:44,475 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:44,480 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:44,485 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,490 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:44,495 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:44,505 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:44,509 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:44,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:44,515 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:44,519 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,650 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 14:40:44,651 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 14:40:44,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:44,655 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:44,658 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:44,662 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:44,665 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:44,669 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:44,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:44,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:44,721 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 14:40:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:44,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084346876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:44,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:44,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:44,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733926803] [2021-06-05 14:40:44,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:44,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:44,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:44,886 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:45,260 INFO L93 Difference]: Finished difference Result 153 states and 315 transitions. [2021-06-05 14:40:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:45,261 INFO L225 Difference]: With dead ends: 153 [2021-06-05 14:40:45,261 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:40:45,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:40:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-06-05 14:40:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 14:40:45,262 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 14:40:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:45,262 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 14:40:45,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 14:40:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:45,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:45,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:45,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13654 [2021-06-05 14:40:45,463 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1304271220, now seen corresponding path program 244 times [2021-06-05 14:40:45,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:45,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482215740] [2021-06-05 14:40:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:45,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:45,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482215740] [2021-06-05 14:40:45,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482215740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:45,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498751233] [2021-06-05 14:40:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:45,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:45,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:45,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:45,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:45,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:45,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:45,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:45,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:45,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:45,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:45,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:45,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:45,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:45,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:45,925 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:113, output treesize:52 [2021-06-05 14:40:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498751233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:45,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:45,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:45,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90280025] [2021-06-05 14:40:45,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:45,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:45,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:45,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:45,996 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:46,182 INFO L93 Difference]: Finished difference Result 151 states and 310 transitions. [2021-06-05 14:40:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:46,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:46,183 INFO L225 Difference]: With dead ends: 151 [2021-06-05 14:40:46,183 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 14:40:46,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 14:40:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2021-06-05 14:40:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 14:40:46,184 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 14:40:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:46,184 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 14:40:46,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 14:40:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:46,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:46,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:46,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13869 [2021-06-05 14:40:46,400 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash 824986544, now seen corresponding path program 245 times [2021-06-05 14:40:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:46,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852178252] [2021-06-05 14:40:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852178252] [2021-06-05 14:40:46,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852178252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164125974] [2021-06-05 14:40:46,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:40:46,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:46,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:46,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:46,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:46,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:46,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:46,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:46,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:46,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:46,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:46,896 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:46,899 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:46,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:46,906 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:46,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:46,957 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:40:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:47,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164125974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:47,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:47,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:47,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505488231] [2021-06-05 14:40:47,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:47,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:47,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:47,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:47,129 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:47,374 INFO L93 Difference]: Finished difference Result 152 states and 313 transitions. [2021-06-05 14:40:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:47,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:47,374 INFO L225 Difference]: With dead ends: 152 [2021-06-05 14:40:47,374 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 14:40:47,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 14:40:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-06-05 14:40:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 14:40:47,376 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 14:40:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:47,376 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 14:40:47,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 14:40:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:47,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:47,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:47,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13888,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:47,576 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash 289756742, now seen corresponding path program 246 times [2021-06-05 14:40:47,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:47,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447066712] [2021-06-05 14:40:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:47,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:47,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447066712] [2021-06-05 14:40:47,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447066712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:47,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728308413] [2021-06-05 14:40:47,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:47,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:47,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:47,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:47,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:47,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:48,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:48,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:48,050 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:48,053 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:48,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:48,060 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:48,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:48,099 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:40:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:48,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728308413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:48,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:48,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:48,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540853285] [2021-06-05 14:40:48,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:48,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:48,234 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:48,712 INFO L93 Difference]: Finished difference Result 190 states and 385 transitions. [2021-06-05 14:40:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:40:48,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:48,720 INFO L225 Difference]: With dead ends: 190 [2021-06-05 14:40:48,721 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 14:40:48,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 601.6ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 14:40:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-06-05 14:40:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 14:40:48,722 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 14:40:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:48,722 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 14:40:48,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 14:40:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:48,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:48,722 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:48,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13918,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:48,939 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1950460278, now seen corresponding path program 247 times [2021-06-05 14:40:48,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:48,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606147190] [2021-06-05 14:40:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606147190] [2021-06-05 14:40:49,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606147190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22887896] [2021-06-05 14:40:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:49,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:49,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:49,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:49,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:49,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:49,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:49,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:49,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:49,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:49,403 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:40:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22887896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:49,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:49,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105655639] [2021-06-05 14:40:49,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:49,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:49,477 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:49,788 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-06-05 14:40:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:49,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:49,788 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:40:49,788 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:40:49,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:40:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-06-05 14:40:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 14:40:49,790 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 14:40:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:49,790 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 14:40:49,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 14:40:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:49,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:49,790 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:49,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13948,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:49,991 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:49,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1865222342, now seen corresponding path program 248 times [2021-06-05 14:40:49,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:49,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33904697] [2021-06-05 14:40:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:50,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33904697] [2021-06-05 14:40:50,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33904697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115753312] [2021-06-05 14:40:50,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:50,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:50,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:50,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:50,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:50,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:50,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:50,452 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:50,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:50,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:50,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:50,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:50,521 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:50,524 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:50,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:50,572 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:40:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:50,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115753312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:50,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:50,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:50,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996984448] [2021-06-05 14:40:50,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:50,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:50,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:50,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:50,736 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:51,281 INFO L93 Difference]: Finished difference Result 198 states and 397 transitions. [2021-06-05 14:40:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:40:51,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:51,282 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:40:51,282 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:40:51,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 723.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:40:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 135. [2021-06-05 14:40:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 14:40:51,283 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 14:40:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:51,283 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 14:40:51,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 14:40:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:51,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:51,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:51,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13972 [2021-06-05 14:40:51,484 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1329992540, now seen corresponding path program 249 times [2021-06-05 14:40:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:51,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179683338] [2021-06-05 14:40:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:51,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:51,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179683338] [2021-06-05 14:40:51,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179683338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:51,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894747927] [2021-06-05 14:40:51,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:51,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:51,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:51,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:51,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:51,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:51,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:51,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:51,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:51,975 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:51,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:51,981 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:51,985 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:52,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:52,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:52,023 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:40:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:52,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894747927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:52,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:52,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:40:52,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602988632] [2021-06-05 14:40:52,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:52,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:52,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:52,155 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:52,863 INFO L93 Difference]: Finished difference Result 213 states and 423 transitions. [2021-06-05 14:40:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:40:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:52,864 INFO L225 Difference]: With dead ends: 213 [2021-06-05 14:40:52,864 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 14:40:52,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 860.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 14:40:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2021-06-05 14:40:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1481481481481484) internal successors, (290), 135 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 290 transitions. [2021-06-05 14:40:52,865 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 290 transitions. Word has length 18 [2021-06-05 14:40:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:52,865 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 290 transitions. [2021-06-05 14:40:52,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 290 transitions. [2021-06-05 14:40:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:52,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:52,866 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:53,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14003,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:53,081 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1361939493, now seen corresponding path program 250 times [2021-06-05 14:40:53,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:53,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229073921] [2021-06-05 14:40:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:53,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:53,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229073921] [2021-06-05 14:40:53,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229073921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:53,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959784100] [2021-06-05 14:40:53,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:53,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:53,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:40:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959784100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:53,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:53,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:53,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682060398] [2021-06-05 14:40:53,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:53,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:53,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:53,407 INFO L87 Difference]: Start difference. First operand 136 states and 290 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:53,515 INFO L93 Difference]: Finished difference Result 167 states and 349 transitions. [2021-06-05 14:40:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:53,516 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:40:53,516 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:40:53,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:40:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 134. [2021-06-05 14:40:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1353383458646618) internal successors, (284), 133 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 284 transitions. [2021-06-05 14:40:53,518 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 284 transitions. Word has length 18 [2021-06-05 14:40:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:53,518 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 284 transitions. [2021-06-05 14:40:53,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 284 transitions. [2021-06-05 14:40:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:53,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:53,518 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:53,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14030,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:53,725 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:53,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1917737862, now seen corresponding path program 251 times [2021-06-05 14:40:53,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:53,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007944777] [2021-06-05 14:40:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:53,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:53,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007944777] [2021-06-05 14:40:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007944777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:53,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219985017] [2021-06-05 14:40:53,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:53,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:53,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:53,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:54,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:54,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:54,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,967 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:54,972 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,977 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,982 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,987 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:54,991 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:54,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:54,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:54,997 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:55,003 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:55,007 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:55,012 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:55,018 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:55,022 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,132 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 14:40:55,132 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:40:55,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:55,137 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:55,155 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:55,159 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:40:55,163 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:55,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:55,219 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 5 variables, input treesize:869, output treesize:89 [2021-06-05 14:40:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:55,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219985017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:55,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:55,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:55,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684512930] [2021-06-05 14:40:55,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:55,393 INFO L87 Difference]: Start difference. First operand 134 states and 284 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:56,341 INFO L93 Difference]: Finished difference Result 240 states and 472 transitions. [2021-06-05 14:40:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:40:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:56,342 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:40:56,342 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 14:40:56,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1179.3ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 14:40:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 133. [2021-06-05 14:40:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1363636363636362) internal successors, (282), 132 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 282 transitions. [2021-06-05 14:40:56,343 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 282 transitions. Word has length 18 [2021-06-05 14:40:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:56,343 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 282 transitions. [2021-06-05 14:40:56,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 282 transitions. [2021-06-05 14:40:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:56,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:56,344 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:56,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14069,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:56,544 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:56,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1628670876, now seen corresponding path program 252 times [2021-06-05 14:40:56,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:56,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379707136] [2021-06-05 14:40:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:56,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:56,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379707136] [2021-06-05 14:40:56,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379707136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:56,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449423660] [2021-06-05 14:40:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:56,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:40:56,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:56,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:57,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:57,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:57,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:57,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,489 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:57,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,497 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,501 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,504 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:57,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:57,513 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,517 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,570 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:57,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:57,573 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:57,576 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:57,579 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:57,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:57,601 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:40:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449423660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:57,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:57,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:57,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463727458] [2021-06-05 14:40:57,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:57,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:57,678 INFO L87 Difference]: Start difference. First operand 133 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:57,987 INFO L93 Difference]: Finished difference Result 159 states and 325 transitions. [2021-06-05 14:40:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:57,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:57,988 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:40:57,988 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 14:40:57,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 624.0ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 14:40:57,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-06-05 14:40:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 14:40:57,989 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 14:40:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:57,989 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 14:40:57,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 14:40:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:57,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:57,990 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:58,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14204 [2021-06-05 14:40:58,190 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:58,190 INFO L82 PathProgramCache]: Analyzing trace with hash -344252192, now seen corresponding path program 253 times [2021-06-05 14:40:58,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:58,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923445812] [2021-06-05 14:40:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:58,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:58,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923445812] [2021-06-05 14:40:58,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923445812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:58,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784840973] [2021-06-05 14:40:58,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:40:58,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:59,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:59,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:40:59,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:40:59,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:59,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:59,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:59,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:59,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:59,154 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:59,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:40:59,162 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:40:59,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:59,170 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,222 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:40:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:40:59,225 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:40:59,228 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:40:59,236 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:59,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:59,261 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:40:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:59,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784840973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:59,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:59,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:40:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759912502] [2021-06-05 14:40:59,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:59,339 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,687 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:40:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:59,710 INFO L93 Difference]: Finished difference Result 154 states and 316 transitions. [2021-06-05 14:40:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:40:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:59,711 INFO L225 Difference]: With dead ends: 154 [2021-06-05 14:40:59,711 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:40:59,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 641.8ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:40:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-06-05 14:40:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 14:40:59,712 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 14:40:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:59,713 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 14:40:59,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 14:40:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:40:59,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:59,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:59,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14290,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:59,914 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash -823536868, now seen corresponding path program 254 times [2021-06-05 14:40:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:59,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550399951] [2021-06-05 14:40:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:00,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:00,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550399951] [2021-06-05 14:41:00,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550399951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:00,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949248602] [2021-06-05 14:41:00,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:00,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:00,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:00,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:01,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:01,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:01,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:01,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:01,044 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:01,053 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,058 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:01,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:01,069 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,073 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:01,078 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,082 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,086 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,180 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:41:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:01,185 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:01,188 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:01,192 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:01,195 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:01,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:01,236 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:41:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:01,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949248602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:01,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:01,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:01,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12482574] [2021-06-05 14:41:01,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:01,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:01,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:01,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:01,371 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:01,779 INFO L93 Difference]: Finished difference Result 155 states and 319 transitions. [2021-06-05 14:41:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:01,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:01,780 INFO L225 Difference]: With dead ends: 155 [2021-06-05 14:41:01,780 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 14:41:01,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 14:41:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2021-06-05 14:41:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 14:41:01,781 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 14:41:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:01,781 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 14:41:01,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 14:41:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:01,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:01,781 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:01,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14393,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:01,994 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 243493130, now seen corresponding path program 255 times [2021-06-05 14:41:01,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:01,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432573994] [2021-06-05 14:41:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:02,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:02,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432573994] [2021-06-05 14:41:02,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432573994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:02,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474857338] [2021-06-05 14:41:02,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:02,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:41:02,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:02,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:02,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:02,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:02,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:02,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:02,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:02,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:02,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:02,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:02,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:02,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:02,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:02,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:02,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:02,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:02,522 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:41:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:02,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474857338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:02,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:02,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315245737] [2021-06-05 14:41:02,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:02,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:02,596 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:02,805 INFO L93 Difference]: Finished difference Result 154 states and 316 transitions. [2021-06-05 14:41:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:02,806 INFO L225 Difference]: With dead ends: 154 [2021-06-05 14:41:02,806 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:41:02,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:41:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-06-05 14:41:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 14:41:02,807 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 14:41:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:02,807 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 14:41:02,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 14:41:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:02,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:02,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:03,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14498,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:03,008 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash -235791546, now seen corresponding path program 256 times [2021-06-05 14:41:03,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:03,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821065630] [2021-06-05 14:41:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:03,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:03,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821065630] [2021-06-05 14:41:03,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821065630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:03,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937607434] [2021-06-05 14:41:03,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:03,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:03,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:03,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:03,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:03,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:03,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:03,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:03,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:03,505 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:03,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:03,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:03,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:03,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:03,551 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:41:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937607434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:03,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:03,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:03,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208612041] [2021-06-05 14:41:03,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:03,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:03,682 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:03,998 INFO L93 Difference]: Finished difference Result 180 states and 360 transitions. [2021-06-05 14:41:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:03,998 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:41:03,998 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 14:41:03,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 14:41:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 137. [2021-06-05 14:41:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 14:41:04,000 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 14:41:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:04,000 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 14:41:04,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 14:41:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:04,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:04,000 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:04,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14523 [2021-06-05 14:41:04,209 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:04,210 INFO L82 PathProgramCache]: Analyzing trace with hash -771021348, now seen corresponding path program 257 times [2021-06-05 14:41:04,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:04,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167614418] [2021-06-05 14:41:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:04,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:04,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167614418] [2021-06-05 14:41:04,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167614418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:04,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009001686] [2021-06-05 14:41:04,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:04,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:41:04,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:04,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:04,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:04,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:04,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:04,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:04,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:04,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:04,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:04,705 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:04,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:04,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:04,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:04,748 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:41:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:04,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009001686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:04,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:04,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:04,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620118181] [2021-06-05 14:41:04,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:04,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:04,880 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:05,163 INFO L93 Difference]: Finished difference Result 158 states and 326 transitions. [2021-06-05 14:41:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:05,163 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:41:05,163 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:41:05,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:41:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2021-06-05 14:41:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1343283582089554) internal successors, (286), 134 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 286 transitions. [2021-06-05 14:41:05,165 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 286 transitions. Word has length 18 [2021-06-05 14:41:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:05,165 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 286 transitions. [2021-06-05 14:41:05,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 286 transitions. [2021-06-05 14:41:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:05,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:05,165 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:05,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14545 [2021-06-05 14:41:05,381 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1283728928, now seen corresponding path program 258 times [2021-06-05 14:41:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:05,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033053949] [2021-06-05 14:41:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:05,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033053949] [2021-06-05 14:41:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033053949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137412523] [2021-06-05 14:41:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:05,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:41:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:05,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:05,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:05,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:05,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:05,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:05,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:05,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:05,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:05,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:05,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:05,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:05,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:05,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:05,916 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:41:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:05,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137412523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:05,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:05,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:05,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047939717] [2021-06-05 14:41:05,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:05,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:05,992 INFO L87 Difference]: Start difference. First operand 135 states and 286 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:06,262 INFO L93 Difference]: Finished difference Result 162 states and 336 transitions. [2021-06-05 14:41:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:06,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:06,262 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:41:06,262 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:41:06,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:41:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2021-06-05 14:41:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 14:41:06,264 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 14:41:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:06,264 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 14:41:06,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 14:41:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:06,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:06,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:06,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14575,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:06,465 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash 804444252, now seen corresponding path program 259 times [2021-06-05 14:41:06,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:06,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69143420] [2021-06-05 14:41:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:06,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:06,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69143420] [2021-06-05 14:41:06,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69143420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:06,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178694092] [2021-06-05 14:41:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:06,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:06,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:06,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:06,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:06,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:06,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:06,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:06,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:06,963 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:06,967 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:06,970 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:07,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:07,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:07,010 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:41:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:07,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178694092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:07,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:07,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:07,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951272699] [2021-06-05 14:41:07,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:07,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:07,141 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:07,486 INFO L93 Difference]: Finished difference Result 180 states and 360 transitions. [2021-06-05 14:41:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:07,487 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:41:07,487 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 14:41:07,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 14:41:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 137. [2021-06-05 14:41:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 14:41:07,488 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 14:41:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:07,488 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 14:41:07,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 14:41:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:07,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:07,489 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:07,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14602,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:07,689 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:07,689 INFO L82 PathProgramCache]: Analyzing trace with hash 269214450, now seen corresponding path program 260 times [2021-06-05 14:41:07,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:07,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435119635] [2021-06-05 14:41:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:07,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:07,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435119635] [2021-06-05 14:41:07,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435119635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:07,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847067283] [2021-06-05 14:41:07,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:07,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:07,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:07,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:08,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:08,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:08,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:08,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:08,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:08,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:08,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:08,163 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,263 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 14:41:08,263 INFO L628 ElimStorePlain]: treesize reduction 56, result has 67.6 percent of original size [2021-06-05 14:41:08,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:08,267 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:08,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:08,273 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:08,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:08,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:08,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:08,317 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:234, output treesize:79 [2021-06-05 14:41:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:08,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847067283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:08,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:08,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023963973] [2021-06-05 14:41:08,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:08,448 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:09,057 INFO L93 Difference]: Finished difference Result 212 states and 421 transitions. [2021-06-05 14:41:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:41:09,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:09,057 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:41:09,057 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 14:41:09,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 766.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 14:41:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2021-06-05 14:41:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 14:41:09,059 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 14:41:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:09,059 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 14:41:09,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 14:41:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:09,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:09,059 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:09,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14628 [2021-06-05 14:41:09,260 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:09,260 INFO L82 PathProgramCache]: Analyzing trace with hash 856959772, now seen corresponding path program 261 times [2021-06-05 14:41:09,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:09,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833306668] [2021-06-05 14:41:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:09,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:09,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833306668] [2021-06-05 14:41:09,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833306668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:09,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660629418] [2021-06-05 14:41:09,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:09,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:41:09,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:09,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:10,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:10,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:10,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,454 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:10,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:10,465 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:10,471 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:10,476 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,481 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:10,486 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,491 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:10,495 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,499 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,611 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 14:41:10,611 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:41:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:10,615 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:10,619 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:10,623 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:10,626 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:10,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:10,672 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:41:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:10,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660629418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:10,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:10,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:10,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388039230] [2021-06-05 14:41:10,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:10,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:10,843 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:11,451 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 14:41:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:11,814 INFO L93 Difference]: Finished difference Result 242 states and 476 transitions. [2021-06-05 14:41:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:41:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:11,814 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:41:11,814 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 14:41:11,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1167.5ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:41:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 14:41:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 136. [2021-06-05 14:41:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2021-06-05 14:41:11,816 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 18 [2021-06-05 14:41:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:11,816 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2021-06-05 14:41:11,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2021-06-05 14:41:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:11,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:11,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:12,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14653 [2021-06-05 14:41:12,032 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash -828699702, now seen corresponding path program 262 times [2021-06-05 14:41:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:12,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012488499] [2021-06-05 14:41:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:12,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:12,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012488499] [2021-06-05 14:41:12,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012488499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:12,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126794061] [2021-06-05 14:41:12,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:12,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:12,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:12,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:12,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:12,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:12,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:12,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:12,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:12,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:12,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:12,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:12,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:12,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:12,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:12,517 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:41:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:12,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126794061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:12,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:12,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:12,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518636635] [2021-06-05 14:41:12,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:12,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:12,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:12,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:12,591 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:12,796 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2021-06-05 14:41:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:12,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:12,797 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:41:12,797 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 14:41:12,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 14:41:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-06-05 14:41:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.129496402877698) internal successors, (296), 139 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 296 transitions. [2021-06-05 14:41:12,798 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 296 transitions. Word has length 18 [2021-06-05 14:41:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:12,798 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 296 transitions. [2021-06-05 14:41:12,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 296 transitions. [2021-06-05 14:41:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:12,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:12,799 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:12,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14753 [2021-06-05 14:41:12,999 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:12,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1307984378, now seen corresponding path program 263 times [2021-06-05 14:41:12,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:12,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825999158] [2021-06-05 14:41:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:13,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:13,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825999158] [2021-06-05 14:41:13,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825999158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:13,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845271188] [2021-06-05 14:41:13,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:13,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:41:13,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:13,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:13,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:13,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:13,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:13,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:13,459 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:13,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:13,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,607 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 14:41:13,607 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.1 percent of original size [2021-06-05 14:41:13,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:13,611 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:13,615 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:13,618 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:13,622 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:13,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:13,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:13,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:41:13,689 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-06-05 14:41:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845271188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:13,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:13,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:13,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014230742] [2021-06-05 14:41:13,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:13,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:13,864 INFO L87 Difference]: Start difference. First operand 140 states and 296 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:14,196 INFO L93 Difference]: Finished difference Result 182 states and 364 transitions. [2021-06-05 14:41:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:14,197 INFO L225 Difference]: With dead ends: 182 [2021-06-05 14:41:14,197 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 14:41:14,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 14:41:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2021-06-05 14:41:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 294 transitions. [2021-06-05 14:41:14,198 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 294 transitions. Word has length 18 [2021-06-05 14:41:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:14,198 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 294 transitions. [2021-06-05 14:41:14,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 294 transitions. [2021-06-05 14:41:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:14,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:14,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:14,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14779 [2021-06-05 14:41:14,399 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:14,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1843214180, now seen corresponding path program 264 times [2021-06-05 14:41:14,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:14,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079046432] [2021-06-05 14:41:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:14,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:14,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079046432] [2021-06-05 14:41:14,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079046432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:14,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126817546] [2021-06-05 14:41:14,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:14,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:41:14,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:14,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:14,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:14,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:14,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:14,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:14,854 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:14,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:14,911 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:14,914 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:14,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:14,921 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:14,924 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:14,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:14,971 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:41:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:15,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126817546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:15,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:15,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784037321] [2021-06-05 14:41:15,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:15,136 INFO L87 Difference]: Start difference. First operand 139 states and 294 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:15,400 INFO L93 Difference]: Finished difference Result 160 states and 330 transitions. [2021-06-05 14:41:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:15,400 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:41:15,400 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 14:41:15,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 14:41:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2021-06-05 14:41:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1313868613138687) internal successors, (292), 137 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 292 transitions. [2021-06-05 14:41:15,402 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 292 transitions. Word has length 18 [2021-06-05 14:41:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:15,402 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 292 transitions. [2021-06-05 14:41:15,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 292 transitions. [2021-06-05 14:41:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:15,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:15,402 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:15,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14808,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:15,602 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1255468858, now seen corresponding path program 265 times [2021-06-05 14:41:15,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:15,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788066982] [2021-06-05 14:41:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:15,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:15,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788066982] [2021-06-05 14:41:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788066982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:15,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841278584] [2021-06-05 14:41:15,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:15,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:16,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:16,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:16,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:16,573 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:16,579 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,584 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,588 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:16,593 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:16,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:16,606 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:16,611 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:16,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:16,615 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,724 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 14:41:16,725 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:41:16,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:16,729 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:16,732 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:16,736 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:16,740 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:16,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:16,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:16,788 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:41:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:16,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841278584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:16,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:16,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469594598] [2021-06-05 14:41:16,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:16,963 INFO L87 Difference]: Start difference. First operand 138 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:17,913 INFO L93 Difference]: Finished difference Result 244 states and 480 transitions. [2021-06-05 14:41:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:41:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:17,913 INFO L225 Difference]: With dead ends: 244 [2021-06-05 14:41:17,913 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:41:17,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:41:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:41:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 137. [2021-06-05 14:41:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-06-05 14:41:17,915 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 18 [2021-06-05 14:41:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:17,915 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-06-05 14:41:17,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-06-05 14:41:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:17,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:17,916 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:18,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14841 [2021-06-05 14:41:18,116 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:18,116 INFO L82 PathProgramCache]: Analyzing trace with hash -215233060, now seen corresponding path program 266 times [2021-06-05 14:41:18,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:18,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751478791] [2021-06-05 14:41:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:18,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:18,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751478791] [2021-06-05 14:41:18,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751478791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:18,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169718315] [2021-06-05 14:41:18,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:18,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:19,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:19,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:19,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,425 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:19,430 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:19,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,441 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:19,446 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:19,451 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,455 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,459 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:19,464 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:19,468 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,579 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 14:41:19,580 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:41:19,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:19,584 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:19,588 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:19,591 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:19,595 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:19,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:19,642 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:41:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:19,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169718315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:19,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:19,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:41:19,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197805183] [2021-06-05 14:41:19,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:41:19,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:41:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:19,825 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:19,957 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-05 14:41:20,487 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 14:41:20,846 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 14:41:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:21,200 INFO L93 Difference]: Finished difference Result 273 states and 533 transitions. [2021-06-05 14:41:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:41:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:21,201 INFO L225 Difference]: With dead ends: 273 [2021-06-05 14:41:21,201 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 14:41:21,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1642.1ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:41:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 14:41:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 142. [2021-06-05 14:41:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1631205673758864) internal successors, (305), 141 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 305 transitions. [2021-06-05 14:41:21,202 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 305 transitions. Word has length 18 [2021-06-05 14:41:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:21,202 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 305 transitions. [2021-06-05 14:41:21,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 305 transitions. [2021-06-05 14:41:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:21,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:21,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:21,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14977,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:21,403 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:21,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1459425270, now seen corresponding path program 267 times [2021-06-05 14:41:21,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:21,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706763353] [2021-06-05 14:41:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:21,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:21,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706763353] [2021-06-05 14:41:21,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706763353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:21,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465262688] [2021-06-05 14:41:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:21,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:41:21,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:21,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:41:21,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:22,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:41:22,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:22,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:22,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,403 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,412 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:22,417 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:22,422 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:22,427 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,431 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,435 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,440 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:22,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:22,445 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:22,448 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,503 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 14:41:22,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:22,506 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:22,509 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:22,512 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:22,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:22,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:22,535 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:606, output treesize:52 [2021-06-05 14:41:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465262688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:22,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:22,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315059227] [2021-06-05 14:41:22,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:22,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:22,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:22,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:22,610 INFO L87 Difference]: Start difference. First operand 142 states and 305 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,953 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 14:41:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:22,983 INFO L93 Difference]: Finished difference Result 165 states and 341 transitions. [2021-06-05 14:41:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:22,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:22,984 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:41:22,984 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:41:22,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:41:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2021-06-05 14:41:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1619718309859155) internal successors, (307), 142 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 307 transitions. [2021-06-05 14:41:22,985 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 307 transitions. Word has length 18 [2021-06-05 14:41:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:22,985 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 307 transitions. [2021-06-05 14:41:22,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 307 transitions. [2021-06-05 14:41:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:22,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:22,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:23,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15145,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:23,186 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash 862618958, now seen corresponding path program 268 times [2021-06-05 14:41:23,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:23,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605356973] [2021-06-05 14:41:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:23,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605356973] [2021-06-05 14:41:23,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605356973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449641419] [2021-06-05 14:41:23,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:23,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:23,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:24,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:24,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:24,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:24,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:24,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:24,145 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:24,149 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:24,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:24,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:24,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:24,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:24,169 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:24,173 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,229 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:41:24,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:24,233 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:24,236 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:24,239 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:24,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:24,261 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:41:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:24,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449641419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:24,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:24,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:24,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860064189] [2021-06-05 14:41:24,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:24,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:24,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:24,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:24,336 INFO L87 Difference]: Start difference. First operand 143 states and 307 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:24,750 INFO L93 Difference]: Finished difference Result 163 states and 338 transitions. [2021-06-05 14:41:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:24,750 INFO L225 Difference]: With dead ends: 163 [2021-06-05 14:41:24,750 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:41:24,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:41:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2021-06-05 14:41:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.160839160839161) internal successors, (309), 143 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 309 transitions. [2021-06-05 14:41:24,752 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 309 transitions. Word has length 18 [2021-06-05 14:41:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:24,752 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 309 transitions. [2021-06-05 14:41:24,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 309 transitions. [2021-06-05 14:41:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:24,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:24,752 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:24,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15372 [2021-06-05 14:41:24,952 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash 383334282, now seen corresponding path program 269 times [2021-06-05 14:41:24,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:24,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090917959] [2021-06-05 14:41:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:25,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:25,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090917959] [2021-06-05 14:41:25,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090917959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:25,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996841621] [2021-06-05 14:41:25,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:25,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:41:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:25,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:25,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:25,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:25,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:25,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:25,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,920 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,935 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,940 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:25,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:25,950 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:25,955 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:25,960 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:25,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:25,965 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:25,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:25,968 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:26,066 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:41:26,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:26,071 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:26,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:26,075 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:26,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:26,078 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:26,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:26,082 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:26,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:26,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:26,122 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:41:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:26,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996841621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:26,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:26,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:26,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041226871] [2021-06-05 14:41:26,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:26,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:26,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:26,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:26,254 INFO L87 Difference]: Start difference. First operand 144 states and 309 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:26,669 INFO L93 Difference]: Finished difference Result 168 states and 348 transitions. [2021-06-05 14:41:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:26,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:26,669 INFO L225 Difference]: With dead ends: 168 [2021-06-05 14:41:26,669 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:41:26,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:41:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2021-06-05 14:41:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1597222222222223) internal successors, (311), 144 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 311 transitions. [2021-06-05 14:41:26,671 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 311 transitions. Word has length 18 [2021-06-05 14:41:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:26,671 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 311 transitions. [2021-06-05 14:41:26,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 311 transitions. [2021-06-05 14:41:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:26,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:26,671 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:26,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15520,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:26,871 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:26,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1450364280, now seen corresponding path program 270 times [2021-06-05 14:41:26,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:26,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984086259] [2021-06-05 14:41:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:27,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984086259] [2021-06-05 14:41:27,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984086259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064456968] [2021-06-05 14:41:27,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:27,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:41:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:27,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:27,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:27,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:27,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:27,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:27,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:27,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:27,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:27,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:27,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:27,363 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:41:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:27,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064456968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:27,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:27,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:27,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975181173] [2021-06-05 14:41:27,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:27,445 INFO L87 Difference]: Start difference. First operand 145 states and 311 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:27,702 INFO L93 Difference]: Finished difference Result 174 states and 364 transitions. [2021-06-05 14:41:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:27,703 INFO L225 Difference]: With dead ends: 174 [2021-06-05 14:41:27,703 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 14:41:27,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 14:41:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2021-06-05 14:41:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 315 transitions. [2021-06-05 14:41:27,704 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 315 transitions. Word has length 18 [2021-06-05 14:41:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:27,704 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 315 transitions. [2021-06-05 14:41:27,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 315 transitions. [2021-06-05 14:41:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:27,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:27,705 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:27,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15653,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:27,905 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:27,905 INFO L82 PathProgramCache]: Analyzing trace with hash 971079604, now seen corresponding path program 271 times [2021-06-05 14:41:27,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:27,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522057154] [2021-06-05 14:41:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:28,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:28,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522057154] [2021-06-05 14:41:28,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522057154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:28,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932390744] [2021-06-05 14:41:28,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:28,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:28,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:28,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:28,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:28,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:28,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:28,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:28,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:28,400 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:28,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:28,407 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:28,410 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:28,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:28,457 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:41:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:28,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932390744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:28,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:28,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:28,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743786877] [2021-06-05 14:41:28,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:28,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:28,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:28,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:28,617 INFO L87 Difference]: Start difference. First operand 147 states and 315 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:28,998 INFO L93 Difference]: Finished difference Result 166 states and 345 transitions. [2021-06-05 14:41:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:28,999 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:41:28,999 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 14:41:28,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 14:41:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-06-05 14:41:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 14:41:29,000 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 18 [2021-06-05 14:41:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:29,000 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 14:41:29,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 14:41:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:29,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:29,000 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:29,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15686,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:29,201 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 435849802, now seen corresponding path program 272 times [2021-06-05 14:41:29,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:29,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316994533] [2021-06-05 14:41:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:29,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:29,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316994533] [2021-06-05 14:41:29,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316994533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:29,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259145618] [2021-06-05 14:41:29,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:29,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:29,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:29,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:29,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:29,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:29,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:29,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:29,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:29,662 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:29,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:29,720 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:29,723 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:29,727 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:29,730 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:29,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:29,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:29,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:29,780 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:41:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:29,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259145618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:29,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:29,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:29,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542129636] [2021-06-05 14:41:29,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:29,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:29,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:29,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:29,947 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:30,607 INFO L93 Difference]: Finished difference Result 224 states and 449 transitions. [2021-06-05 14:41:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:41:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:30,608 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:41:30,608 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:41:30,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 861.3ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:41:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:41:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 145. [2021-06-05 14:41:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1597222222222223) internal successors, (311), 144 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 311 transitions. [2021-06-05 14:41:30,610 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 311 transitions. Word has length 18 [2021-06-05 14:41:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:30,610 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 311 transitions. [2021-06-05 14:41:30,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 311 transitions. [2021-06-05 14:41:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:30,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:30,610 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:30,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15719 [2021-06-05 14:41:30,810 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1804367218, now seen corresponding path program 273 times [2021-06-05 14:41:30,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:30,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863422315] [2021-06-05 14:41:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:30,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:30,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863422315] [2021-06-05 14:41:30,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863422315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:30,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924577485] [2021-06-05 14:41:30,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:31,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:41:31,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:31,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:31,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:31,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:31,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:31,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:31,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:31,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:31,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:31,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:31,320 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:41:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:31,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924577485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:31,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:31,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:31,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998739885] [2021-06-05 14:41:31,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:31,394 INFO L87 Difference]: Start difference. First operand 145 states and 311 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:31,690 INFO L93 Difference]: Finished difference Result 175 states and 366 transitions. [2021-06-05 14:41:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:31,691 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:41:31,691 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 14:41:31,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 14:41:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2021-06-05 14:41:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1564625850340136) internal successors, (317), 147 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 317 transitions. [2021-06-05 14:41:31,692 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 317 transitions. Word has length 18 [2021-06-05 14:41:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:31,692 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 317 transitions. [2021-06-05 14:41:31,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 317 transitions. [2021-06-05 14:41:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:31,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:31,693 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:31,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15756 [2021-06-05 14:41:31,893 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:31,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2011315402, now seen corresponding path program 274 times [2021-06-05 14:41:31,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:31,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409061047] [2021-06-05 14:41:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:32,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:32,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409061047] [2021-06-05 14:41:32,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409061047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:32,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964021273] [2021-06-05 14:41:32,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:32,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:32,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:32,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:32,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:32,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:32,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:32,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:32,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:32,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:32,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:32,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:32,387 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:41:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:32,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964021273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:32,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:32,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:32,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846359372] [2021-06-05 14:41:32,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:32,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:32,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:32,520 INFO L87 Difference]: Start difference. First operand 148 states and 317 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:32,930 INFO L93 Difference]: Finished difference Result 167 states and 347 transitions. [2021-06-05 14:41:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:32,930 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:41:32,930 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:41:32,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:41:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2021-06-05 14:41:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 315 transitions. [2021-06-05 14:41:32,932 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 315 transitions. Word has length 18 [2021-06-05 14:41:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:32,932 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 315 transitions. [2021-06-05 14:41:32,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 315 transitions. [2021-06-05 14:41:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:32,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:32,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:33,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15785,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:33,132 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1476085600, now seen corresponding path program 275 times [2021-06-05 14:41:33,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:33,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763965630] [2021-06-05 14:41:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:33,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:33,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763965630] [2021-06-05 14:41:33,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763965630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:33,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941619079] [2021-06-05 14:41:33,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:33,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:41:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:33,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:33,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:33,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:33,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:33,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:33,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:33,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:33,644 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:33,648 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:33,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:33,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:33,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:33,697 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:41:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:33,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941619079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:33,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:33,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524226440] [2021-06-05 14:41:33,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:33,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:33,832 INFO L87 Difference]: Start difference. First operand 147 states and 315 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:34,415 INFO L93 Difference]: Finished difference Result 225 states and 451 transitions. [2021-06-05 14:41:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:41:34,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:34,415 INFO L225 Difference]: With dead ends: 225 [2021-06-05 14:41:34,415 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 14:41:34,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 14:41:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 14:41:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 14:41:34,417 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 18 [2021-06-05 14:41:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:34,417 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 14:41:34,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 14:41:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:34,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:34,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:34,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15805 [2021-06-05 14:41:34,618 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2063830922, now seen corresponding path program 276 times [2021-06-05 14:41:34,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:34,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665945256] [2021-06-05 14:41:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:34,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:34,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665945256] [2021-06-05 14:41:34,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665945256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:34,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982683463] [2021-06-05 14:41:34,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:34,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:41:34,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:34,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:35,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:41:35,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:41:35,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:35,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:35,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:35,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,825 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,830 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,840 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:35,846 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,851 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:35,857 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,862 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:35,867 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:35,872 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:35,878 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,882 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:35,886 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,028 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:41:36,029 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:41:36,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:36,033 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:36,037 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:36,041 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:36,045 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:36,049 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:36,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:36,109 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 14:41:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:36,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982683463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:36,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:36,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:36,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335987740] [2021-06-05 14:41:36,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:36,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:36,297 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:37,212 INFO L93 Difference]: Finished difference Result 255 states and 506 transitions. [2021-06-05 14:41:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:41:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:37,213 INFO L225 Difference]: With dead ends: 255 [2021-06-05 14:41:37,213 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:41:37,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1161.6ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:41:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 146. [2021-06-05 14:41:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 14:41:37,215 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 18 [2021-06-05 14:41:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:37,215 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 14:41:37,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 14:41:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:37,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:37,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:37,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15835 [2021-06-05 14:41:37,415 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:37,416 INFO L82 PathProgramCache]: Analyzing trace with hash 378171448, now seen corresponding path program 277 times [2021-06-05 14:41:37,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:37,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944028280] [2021-06-05 14:41:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:37,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:37,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944028280] [2021-06-05 14:41:37,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944028280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:37,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712885411] [2021-06-05 14:41:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:37,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:37,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:37,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:37,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:37,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:37,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:37,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:37,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:37,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:37,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:37,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:37,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:37,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:37,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:37,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:37,908 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:41:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:37,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712885411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:37,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:37,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:37,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889852395] [2021-06-05 14:41:37,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:37,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:37,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:37,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:37,982 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:38,250 INFO L93 Difference]: Finished difference Result 169 states and 350 transitions. [2021-06-05 14:41:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:38,251 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:41:38,251 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:41:38,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:41:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-06-05 14:41:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 315 transitions. [2021-06-05 14:41:38,252 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 315 transitions. Word has length 18 [2021-06-05 14:41:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:38,252 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 315 transitions. [2021-06-05 14:41:38,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 315 transitions. [2021-06-05 14:41:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:38,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:38,253 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:38,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15974 [2021-06-05 14:41:38,453 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash -101113228, now seen corresponding path program 278 times [2021-06-05 14:41:38,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:38,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506842748] [2021-06-05 14:41:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:38,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:38,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506842748] [2021-06-05 14:41:38,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506842748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:38,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41076222] [2021-06-05 14:41:38,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:38,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:38,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:38,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:38,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:38,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:38,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:38,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:38,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:38,981 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:38,984 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:38,988 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:38,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:38,994 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:39,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:39,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:39,045 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:41:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:39,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41076222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:39,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:39,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:39,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097091906] [2021-06-05 14:41:39,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:39,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:39,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:39,214 INFO L87 Difference]: Start difference. First operand 147 states and 315 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:40,200 INFO L93 Difference]: Finished difference Result 237 states and 465 transitions. [2021-06-05 14:41:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:41:40,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:40,201 INFO L225 Difference]: With dead ends: 237 [2021-06-05 14:41:40,201 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:41:40,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1138.6ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:41:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:41:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2021-06-05 14:41:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 14:41:40,202 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 14:41:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:40,203 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 14:41:40,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 14:41:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:40,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:40,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:40,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15996,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:40,403 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:40,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:40,403 INFO L82 PathProgramCache]: Analyzing trace with hash -636343030, now seen corresponding path program 279 times [2021-06-05 14:41:40,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:40,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584433826] [2021-06-05 14:41:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:40,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:40,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584433826] [2021-06-05 14:41:40,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584433826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:40,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005487727] [2021-06-05 14:41:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:40,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:41:40,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:40,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:41:40,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:40,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:40,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:40,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:40,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:40,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:40,865 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:40,868 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:40,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:40,874 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:40,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:40,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:40,913 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:41:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:41,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005487727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:41,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:41,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294976547] [2021-06-05 14:41:41,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:41,043 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:41,605 INFO L93 Difference]: Finished difference Result 227 states and 457 transitions. [2021-06-05 14:41:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:41:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:41,605 INFO L225 Difference]: With dead ends: 227 [2021-06-05 14:41:41,605 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 14:41:41,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 669.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 14:41:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 149. [2021-06-05 14:41:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 14:41:41,607 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 14:41:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:41,607 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 14:41:41,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 14:41:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:41,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:41,607 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:41,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16026 [2021-06-05 14:41:41,807 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash -48597708, now seen corresponding path program 280 times [2021-06-05 14:41:41,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:41,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218291264] [2021-06-05 14:41:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:41,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:41,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218291264] [2021-06-05 14:41:41,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218291264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:41,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752859386] [2021-06-05 14:41:41,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:42,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:42,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:42,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:42,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:42,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:41:42,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:42,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:42,843 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,859 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:42,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:42,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:42,882 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:41:42,888 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,893 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,898 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,907 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:42,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:42,913 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,917 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,921 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,925 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:43,071 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 14:41:43,072 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-06-05 14:41:43,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:43,076 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:43,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:43,080 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:43,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:43,084 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:43,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:43,088 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:43,092 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:43,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:43,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:43,153 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 14:41:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:43,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752859386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:43,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:43,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:43,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707509585] [2021-06-05 14:41:43,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:43,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:43,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:43,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:43,338 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:44,280 INFO L93 Difference]: Finished difference Result 258 states and 514 transitions. [2021-06-05 14:41:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:41:44,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:44,280 INFO L225 Difference]: With dead ends: 258 [2021-06-05 14:41:44,280 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:41:44,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1130.3ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:41:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 149. [2021-06-05 14:41:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 14:41:44,282 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 14:41:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:44,282 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 14:41:44,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 14:41:44,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:44,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:44,282 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:44,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16052 [2021-06-05 14:41:44,483 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash 991638090, now seen corresponding path program 281 times [2021-06-05 14:41:44,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:44,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137141710] [2021-06-05 14:41:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:44,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137141710] [2021-06-05 14:41:44,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137141710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099036855] [2021-06-05 14:41:44,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:44,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:41:44,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:44,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:45,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:45,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:45,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:45,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:45,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:45,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:45,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:45,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,694 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-06-05 14:41:45,695 INFO L628 ElimStorePlain]: treesize reduction 375, result has 23.8 percent of original size [2021-06-05 14:41:45,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:45,699 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:45,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:45,745 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:45,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:45,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:45,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:45,832 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:45,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:45,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:45,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:45,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:45,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:45,952 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:45,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:45,988 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 14:41:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:46,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099036855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:46,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:46,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:41:46,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925670534] [2021-06-05 14:41:46,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:41:46,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:41:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:46,121 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:46,305 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 14:41:46,875 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-06-05 14:41:47,247 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 14:41:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:47,623 INFO L93 Difference]: Finished difference Result 286 states and 565 transitions. [2021-06-05 14:41:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:41:47,624 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:47,624 INFO L225 Difference]: With dead ends: 286 [2021-06-05 14:41:47,624 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 14:41:47,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1685.9ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:41:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 14:41:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-06-05 14:41:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 14:41:47,626 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 14:41:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:47,626 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 14:41:47,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 14:41:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:47,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:47,626 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:47,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16275 [2021-06-05 14:41:47,827 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1106917878, now seen corresponding path program 282 times [2021-06-05 14:41:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:47,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789330465] [2021-06-05 14:41:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:47,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:47,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789330465] [2021-06-05 14:41:47,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789330465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:47,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051428002] [2021-06-05 14:41:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:48,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:41:48,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:48,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:48,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:48,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:48,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:48,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:48,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:48,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:48,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:48,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:48,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:48,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:48,332 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:48,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:48,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:48,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:48,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:48,356 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:41:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:48,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051428002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:48,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:48,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:48,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917925594] [2021-06-05 14:41:48,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:48,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:48,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:48,428 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:48,723 INFO L93 Difference]: Finished difference Result 180 states and 377 transitions. [2021-06-05 14:41:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:48,723 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:41:48,723 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:41:48,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:41:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-06-05 14:41:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1677852348993287) internal successors, (323), 149 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 323 transitions. [2021-06-05 14:41:48,725 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 323 transitions. Word has length 18 [2021-06-05 14:41:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:48,725 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 323 transitions. [2021-06-05 14:41:48,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 323 transitions. [2021-06-05 14:41:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:48,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:48,725 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:48,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16424,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:48,926 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1586202554, now seen corresponding path program 283 times [2021-06-05 14:41:48,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:48,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213750126] [2021-06-05 14:41:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:49,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:49,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213750126] [2021-06-05 14:41:49,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213750126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674115161] [2021-06-05 14:41:49,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:49,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:49,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:49,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:49,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:49,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:49,373 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:49,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:49,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:49,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:49,441 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:49,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:49,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:49,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:49,499 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 14:41:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:49,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674115161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:49,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:49,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439681264] [2021-06-05 14:41:49,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:49,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:49,663 INFO L87 Difference]: Start difference. First operand 150 states and 323 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:50,495 INFO L93 Difference]: Finished difference Result 216 states and 438 transitions. [2021-06-05 14:41:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:41:50,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:50,496 INFO L225 Difference]: With dead ends: 216 [2021-06-05 14:41:50,496 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 14:41:50,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 979.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 14:41:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2021-06-05 14:41:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 14:41:50,497 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 18 [2021-06-05 14:41:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:50,497 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 14:41:50,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 14:41:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:50,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:50,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:50,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16458,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:50,714 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2121432356, now seen corresponding path program 284 times [2021-06-05 14:41:50,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:50,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247741516] [2021-06-05 14:41:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:50,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247741516] [2021-06-05 14:41:50,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247741516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:50,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951265417] [2021-06-05 14:41:50,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:50,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:50,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:50,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:51,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:51,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:51,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:51,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:51,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:51,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:51,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:51,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:51,216 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:51,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:51,223 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:51,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:51,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:51,270 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:41:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:51,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951265417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:51,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:51,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:41:51,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790863990] [2021-06-05 14:41:51,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:51,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:51,432 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:52,011 INFO L93 Difference]: Finished difference Result 233 states and 468 transitions. [2021-06-05 14:41:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:41:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:52,012 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:41:52,012 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 14:41:52,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 732.3ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 14:41:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 150. [2021-06-05 14:41:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 14:41:52,014 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 14:41:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:52,014 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 14:41:52,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 14:41:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:52,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:52,014 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:52,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16491 [2021-06-05 14:41:52,214 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:52,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2089485403, now seen corresponding path program 285 times [2021-06-05 14:41:52,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:52,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100152233] [2021-06-05 14:41:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:52,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:52,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100152233] [2021-06-05 14:41:52,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100152233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:52,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607798236] [2021-06-05 14:41:52,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:52,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:41:52,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:52,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:41:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:52,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607798236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:52,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:52,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:52,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739998492] [2021-06-05 14:41:52,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:52,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:52,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:52,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:52,434 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:52,570 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 14:41:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:52,571 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:41:52,571 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:41:52,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:41:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2021-06-05 14:41:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1700680272108843) internal successors, (319), 147 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 319 transitions. [2021-06-05 14:41:52,573 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 319 transitions. Word has length 18 [2021-06-05 14:41:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:52,573 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 319 transitions. [2021-06-05 14:41:52,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 319 transitions. [2021-06-05 14:41:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:52,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:52,573 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:52,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16521 [2021-06-05 14:41:52,773 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1533687034, now seen corresponding path program 286 times [2021-06-05 14:41:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:52,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295692367] [2021-06-05 14:41:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:52,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:52,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295692367] [2021-06-05 14:41:52,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295692367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:52,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36626652] [2021-06-05 14:41:52,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:53,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:53,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:53,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:53,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:53,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:53,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:53,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:53,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:53,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:53,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:53,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:53,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:54,000 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:54,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:41:54,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:54,017 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:54,022 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:41:54,027 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:54,032 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:54,037 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:54,042 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:54,045 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,156 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 14:41:54,157 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:41:54,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:54,161 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:41:54,165 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:54,169 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:54,172 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:54,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:54,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:54,219 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:41:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:54,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36626652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:54,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:54,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:41:54,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014296357] [2021-06-05 14:41:54,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:54,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:54,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:54,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:54,391 INFO L87 Difference]: Start difference. First operand 148 states and 319 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:55,327 INFO L93 Difference]: Finished difference Result 260 states and 517 transitions. [2021-06-05 14:41:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:41:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:55,327 INFO L225 Difference]: With dead ends: 260 [2021-06-05 14:41:55,327 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 14:41:55,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1111.5ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 14:41:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 147. [2021-06-05 14:41:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 14:41:55,329 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 18 [2021-06-05 14:41:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:55,329 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 14:41:55,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 14:41:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:55,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:55,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:55,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16529,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:55,530 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:55,530 INFO L82 PathProgramCache]: Analyzing trace with hash -493451236, now seen corresponding path program 287 times [2021-06-05 14:41:55,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:55,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848274254] [2021-06-05 14:41:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:55,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:55,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848274254] [2021-06-05 14:41:55,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848274254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:55,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919834894] [2021-06-05 14:41:55,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:55,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:41:55,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:55,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:55,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:56,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:56,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:56,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:41:56,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:56,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:56,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:41:56,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:56,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:56,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,662 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 14:41:56,662 INFO L628 ElimStorePlain]: treesize reduction 373, result has 23.7 percent of original size [2021-06-05 14:41:56,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:41:56,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:56,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:56,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:56,754 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:56,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:56,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:56,839 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:56,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:56,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:56,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:41:56,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:56,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:56,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:56,954 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 14:41:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:57,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919834894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:57,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:57,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:41:57,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618447449] [2021-06-05 14:41:57,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:41:57,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:57,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:41:57,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:57,087 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:57,263 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-05 14:41:57,409 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-06-05 14:41:57,965 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-06-05 14:41:58,179 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-05 14:41:58,319 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-05 14:41:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:58,750 INFO L93 Difference]: Finished difference Result 287 states and 566 transitions. [2021-06-05 14:41:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:41:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:41:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:58,751 INFO L225 Difference]: With dead ends: 287 [2021-06-05 14:41:58,751 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 14:41:58,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1771.8ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:41:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 14:41:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 147. [2021-06-05 14:41:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 14:41:58,753 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 18 [2021-06-05 14:41:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:58,753 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 14:41:58,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 14:41:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:41:58,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:58,753 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:58,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16679,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:58,953 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash 844115978, now seen corresponding path program 288 times [2021-06-05 14:41:58,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:58,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775289575] [2021-06-05 14:41:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:59,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775289575] [2021-06-05 14:41:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775289575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026725892] [2021-06-05 14:41:59,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:59,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:41:59,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:41:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:00,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:00,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:00,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:00,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:42:00,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:00,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:42:00,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:00,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,253 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 14:42:00,254 INFO L628 ElimStorePlain]: treesize reduction 370, result has 24.0 percent of original size [2021-06-05 14:42:00,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:00,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:00,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:42:00,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:00,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:00,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:00,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:42:00,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:00,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:00,434 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:00,474 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:00,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:00,512 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:00,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:00,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:42:00,547 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-06-05 14:42:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:00,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026725892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:00,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:00,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:42:00,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223018550] [2021-06-05 14:42:00,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:00,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:00,675 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,171 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 14:42:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:01,339 INFO L93 Difference]: Finished difference Result 209 states and 430 transitions. [2021-06-05 14:42:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:42:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:01,340 INFO L225 Difference]: With dead ends: 209 [2021-06-05 14:42:01,340 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:42:01,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 944.4ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:42:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2021-06-05 14:42:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1733333333333333) internal successors, (326), 150 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 326 transitions. [2021-06-05 14:42:01,341 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 326 transitions. Word has length 18 [2021-06-05 14:42:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:01,341 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 326 transitions. [2021-06-05 14:42:01,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 326 transitions. [2021-06-05 14:42:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:01,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:01,342 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:01,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16786 [2021-06-05 14:42:01,542 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318047, now seen corresponding path program 289 times [2021-06-05 14:42:01,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:01,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780181394] [2021-06-05 14:42:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:01,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780181394] [2021-06-05 14:42:01,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780181394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657825247] [2021-06-05 14:42:01,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:01,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:01,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657825247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:01,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:01,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:42:01,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103980224] [2021-06-05 14:42:01,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:01,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:01,765 INFO L87 Difference]: Start difference. First operand 151 states and 326 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:01,906 INFO L93 Difference]: Finished difference Result 199 states and 416 transitions. [2021-06-05 14:42:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:01,907 INFO L225 Difference]: With dead ends: 199 [2021-06-05 14:42:01,907 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 14:42:01,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 14:42:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 155. [2021-06-05 14:42:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.168831168831169) internal successors, (334), 154 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 334 transitions. [2021-06-05 14:42:01,908 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 334 transitions. Word has length 19 [2021-06-05 14:42:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:01,908 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 334 transitions. [2021-06-05 14:42:01,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 334 transitions. [2021-06-05 14:42:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:01,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:01,909 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:02,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16916 [2021-06-05 14:42:02,109 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash 112722865, now seen corresponding path program 290 times [2021-06-05 14:42:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:02,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762236844] [2021-06-05 14:42:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:02,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:02,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762236844] [2021-06-05 14:42:02,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762236844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:02,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858361589] [2021-06-05 14:42:02,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:02,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:02,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:02,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:02,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858361589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:02,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:02,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:42:02,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194905630] [2021-06-05 14:42:02,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:42:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:02,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:42:02,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:42:02,349 INFO L87 Difference]: Start difference. First operand 155 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:02,509 INFO L93 Difference]: Finished difference Result 198 states and 418 transitions. [2021-06-05 14:42:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:02,510 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:42:02,510 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:42:02,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:42:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 155. [2021-06-05 14:42:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.168831168831169) internal successors, (334), 154 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 334 transitions. [2021-06-05 14:42:02,511 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 334 transitions. Word has length 19 [2021-06-05 14:42:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:02,512 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 334 transitions. [2021-06-05 14:42:02,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 334 transitions. [2021-06-05 14:42:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:02,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:02,512 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:02,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16920,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:02,728 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:02,728 INFO L82 PathProgramCache]: Analyzing trace with hash 121885699, now seen corresponding path program 291 times [2021-06-05 14:42:02,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:02,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309099959] [2021-06-05 14:42:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:02,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:02,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309099959] [2021-06-05 14:42:02,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309099959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:02,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834119132] [2021-06-05 14:42:02,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:02,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:02,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:02,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834119132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:02,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:02,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:02,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123860889] [2021-06-05 14:42:02,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:02,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:02,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:02,985 INFO L87 Difference]: Start difference. First operand 155 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:03,142 INFO L93 Difference]: Finished difference Result 190 states and 402 transitions. [2021-06-05 14:42:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:03,142 INFO L225 Difference]: With dead ends: 190 [2021-06-05 14:42:03,142 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 14:42:03,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 14:42:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 155. [2021-06-05 14:42:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.168831168831169) internal successors, (334), 154 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 334 transitions. [2021-06-05 14:42:03,144 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 334 transitions. Word has length 19 [2021-06-05 14:42:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:03,144 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 334 transitions. [2021-06-05 14:42:03,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 334 transitions. [2021-06-05 14:42:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:03,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:03,145 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:03,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16924 [2021-06-05 14:42:03,345 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash 758136460, now seen corresponding path program 292 times [2021-06-05 14:42:03,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:03,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779096462] [2021-06-05 14:42:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:03,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779096462] [2021-06-05 14:42:03,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779096462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295944378] [2021-06-05 14:42:03,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:03,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:03,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:03,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:03,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295944378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:03,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:03,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:03,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428586286] [2021-06-05 14:42:03,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:03,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:03,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:03,859 INFO L87 Difference]: Start difference. First operand 155 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:04,200 INFO L93 Difference]: Finished difference Result 198 states and 408 transitions. [2021-06-05 14:42:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:04,200 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:42:04,200 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:42:04,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:42:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 155. [2021-06-05 14:42:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1623376623376624) internal successors, (333), 154 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 333 transitions. [2021-06-05 14:42:04,202 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 333 transitions. Word has length 19 [2021-06-05 14:42:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:04,202 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 333 transitions. [2021-06-05 14:42:04,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 333 transitions. [2021-06-05 14:42:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:04,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:04,202 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:04,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16928,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:04,402 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:04,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1263292047, now seen corresponding path program 293 times [2021-06-05 14:42:04,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:04,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494930721] [2021-06-05 14:42:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:04,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:04,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494930721] [2021-06-05 14:42:04,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494930721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:04,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874513740] [2021-06-05 14:42:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:04,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:04,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:04,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:04,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874513740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:04,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:04,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:42:04,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262333959] [2021-06-05 14:42:04,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:04,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:04,639 INFO L87 Difference]: Start difference. First operand 155 states and 333 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:04,807 INFO L93 Difference]: Finished difference Result 186 states and 393 transitions. [2021-06-05 14:42:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:04,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:04,807 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:42:04,807 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 14:42:04,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 14:42:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-06-05 14:42:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1623376623376624) internal successors, (333), 154 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 333 transitions. [2021-06-05 14:42:04,809 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 333 transitions. Word has length 19 [2021-06-05 14:42:04,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:04,809 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 333 transitions. [2021-06-05 14:42:04,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 333 transitions. [2021-06-05 14:42:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:04,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:04,809 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:05,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16948 [2021-06-05 14:42:05,010 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash -272936504, now seen corresponding path program 294 times [2021-06-05 14:42:05,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:05,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999604972] [2021-06-05 14:42:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:05,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:05,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999604972] [2021-06-05 14:42:05,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999604972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:05,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694921855] [2021-06-05 14:42:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:05,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:05,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:05,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694921855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:05,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:05,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:05,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253070521] [2021-06-05 14:42:05,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:05,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:05,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:05,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:05,521 INFO L87 Difference]: Start difference. First operand 155 states and 333 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:05,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:05,908 INFO L93 Difference]: Finished difference Result 198 states and 409 transitions. [2021-06-05 14:42:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:05,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:05,909 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:42:05,909 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 14:42:05,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 14:42:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 155. [2021-06-05 14:42:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 14:42:05,910 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 14:42:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:05,910 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 14:42:05,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 14:42:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:05,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:05,911 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:06,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16952,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:06,123 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:06,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2017160771, now seen corresponding path program 295 times [2021-06-05 14:42:06,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:06,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288095220] [2021-06-05 14:42:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:06,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288095220] [2021-06-05 14:42:06,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288095220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485036782] [2021-06-05 14:42:06,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:06,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485036782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:06,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:06,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:42:06,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246496351] [2021-06-05 14:42:06,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:06,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:06,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:06,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:06,375 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:06,634 INFO L93 Difference]: Finished difference Result 196 states and 406 transitions. [2021-06-05 14:42:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:06,634 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:42:06,635 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:42:06,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:42:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-06-05 14:42:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.167741935483871) internal successors, (336), 155 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 336 transitions. [2021-06-05 14:42:06,636 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 336 transitions. Word has length 19 [2021-06-05 14:42:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:06,636 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 336 transitions. [2021-06-05 14:42:06,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 336 transitions. [2021-06-05 14:42:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:06,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:06,637 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:06,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16972 [2021-06-05 14:42:06,837 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:06,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2049107724, now seen corresponding path program 296 times [2021-06-05 14:42:06,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:06,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199268147] [2021-06-05 14:42:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:06,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199268147] [2021-06-05 14:42:06,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199268147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452786432] [2021-06-05 14:42:06,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:06,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:06,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:06,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:06,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:07,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:07,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:07,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:07,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,411 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:42:07,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:07,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:07,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:07,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:07,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:07,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:07,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:07,514 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:07,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:07,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:07,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:07,572 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:07,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:07,600 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:07,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:07,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:07,624 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:42:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:07,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452786432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:07,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:07,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66440041] [2021-06-05 14:42:07,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:07,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:07,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:07,656 INFO L87 Difference]: Start difference. First operand 156 states and 336 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:08,336 INFO L93 Difference]: Finished difference Result 211 states and 430 transitions. [2021-06-05 14:42:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:42:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:08,336 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:42:08,336 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 14:42:08,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 737.6ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:42:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 14:42:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-06-05 14:42:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1635220125786163) internal successors, (344), 159 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 344 transitions. [2021-06-05 14:42:08,338 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 344 transitions. Word has length 19 [2021-06-05 14:42:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:08,338 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 344 transitions. [2021-06-05 14:42:08,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 344 transitions. [2021-06-05 14:42:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:08,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:08,338 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:08,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16981 [2021-06-05 14:42:08,539 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:08,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1569823048, now seen corresponding path program 297 times [2021-06-05 14:42:08,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:08,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071464331] [2021-06-05 14:42:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:08,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:08,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071464331] [2021-06-05 14:42:08,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071464331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:08,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775602812] [2021-06-05 14:42:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:08,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:08,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:08,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:08,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:08,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:09,029 INFO L628 ElimStorePlain]: treesize reduction 71, result has 44.5 percent of original size [2021-06-05 14:42:09,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:09,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:09,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:09,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:09,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:09,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:09,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:09,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:09,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:09,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:09,105 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:09,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:09,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:09,123 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 14:42:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:09,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775602812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:09,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:09,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:09,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983985696] [2021-06-05 14:42:09,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:09,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:09,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:09,153 INFO L87 Difference]: Start difference. First operand 160 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:09,433 INFO L93 Difference]: Finished difference Result 194 states and 406 transitions. [2021-06-05 14:42:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:09,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:09,434 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:42:09,434 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:42:09,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:42:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 156. [2021-06-05 14:42:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.161290322580645) internal successors, (335), 155 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 335 transitions. [2021-06-05 14:42:09,435 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 335 transitions. Word has length 19 [2021-06-05 14:42:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:09,435 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 335 transitions. [2021-06-05 14:42:09,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 335 transitions. [2021-06-05 14:42:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:09,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:09,436 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:09,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17003 [2021-06-05 14:42:09,636 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:09,636 INFO L82 PathProgramCache]: Analyzing trace with hash -405838445, now seen corresponding path program 298 times [2021-06-05 14:42:09,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:09,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954741763] [2021-06-05 14:42:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:09,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:09,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954741763] [2021-06-05 14:42:09,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954741763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:09,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419995679] [2021-06-05 14:42:09,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:09,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:09,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:09,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:09,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:09,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419995679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:09,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:09,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:42:09,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122803595] [2021-06-05 14:42:09,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:09,883 INFO L87 Difference]: Start difference. First operand 156 states and 335 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:10,047 INFO L93 Difference]: Finished difference Result 183 states and 384 transitions. [2021-06-05 14:42:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:10,047 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:42:10,048 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:42:10,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:42:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 156. [2021-06-05 14:42:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 14:42:10,049 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 14:42:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:10,049 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 14:42:10,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 14:42:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:10,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:10,049 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:10,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17026,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:10,250 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1867476129, now seen corresponding path program 299 times [2021-06-05 14:42:10,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:10,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806402430] [2021-06-05 14:42:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:10,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:10,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806402430] [2021-06-05 14:42:10,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806402430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:10,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627618409] [2021-06-05 14:42:10,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:10,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:10,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:10,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:10,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:10,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627618409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:10,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:10,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:42:10,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866970569] [2021-06-05 14:42:10,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:42:10,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:42:10,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:42:10,504 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:10,688 INFO L93 Difference]: Finished difference Result 183 states and 386 transitions. [2021-06-05 14:42:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:10,689 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:42:10,689 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:42:10,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:42:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2021-06-05 14:42:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 14:42:10,690 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 14:42:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:10,691 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 14:42:10,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 14:42:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:10,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:10,691 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:10,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17036 [2021-06-05 14:42:10,891 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1858313295, now seen corresponding path program 300 times [2021-06-05 14:42:10,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:10,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523697985] [2021-06-05 14:42:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:10,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:10,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523697985] [2021-06-05 14:42:10,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523697985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:10,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315313096] [2021-06-05 14:42:10,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:11,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:11,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:11,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:11,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315313096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:11,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:11,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:11,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565261763] [2021-06-05 14:42:11,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:11,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:11,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:11,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:11,230 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:11,448 INFO L93 Difference]: Finished difference Result 200 states and 420 transitions. [2021-06-05 14:42:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:11,448 INFO L225 Difference]: With dead ends: 200 [2021-06-05 14:42:11,448 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 14:42:11,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 14:42:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 157. [2021-06-05 14:42:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 14:42:11,450 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 14:42:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:11,450 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 14:42:11,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 14:42:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:11,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:11,450 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:11,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17040,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:11,651 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:11,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1051476255, now seen corresponding path program 301 times [2021-06-05 14:42:11,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:11,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960372584] [2021-06-05 14:42:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:11,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:11,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960372584] [2021-06-05 14:42:11,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960372584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:11,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752628640] [2021-06-05 14:42:11,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:11,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:11,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752628640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:42:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339256482] [2021-06-05 14:42:11,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:11,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:11,889 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:12,057 INFO L93 Difference]: Finished difference Result 197 states and 414 transitions. [2021-06-05 14:42:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:12,058 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:42:12,058 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:42:12,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:42:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 158. [2021-06-05 14:42:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 14:42:12,060 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 14:42:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:12,060 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 14:42:12,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 14:42:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:12,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:12,060 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:12,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17070,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:12,261 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:12,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1735682165, now seen corresponding path program 302 times [2021-06-05 14:42:12,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:12,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438077411] [2021-06-05 14:42:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:12,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:12,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438077411] [2021-06-05 14:42:12,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438077411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:12,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871249424] [2021-06-05 14:42:12,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:12,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871249424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:12,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:12,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:42:12,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236181037] [2021-06-05 14:42:12,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:12,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:12,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:12,517 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:12,661 INFO L93 Difference]: Finished difference Result 195 states and 411 transitions. [2021-06-05 14:42:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:12,662 INFO L225 Difference]: With dead ends: 195 [2021-06-05 14:42:12,662 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:42:12,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:42:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 159. [2021-06-05 14:42:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.151898734177215) internal successors, (340), 158 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 340 transitions. [2021-06-05 14:42:12,663 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 340 transitions. Word has length 19 [2021-06-05 14:42:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:12,663 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 340 transitions. [2021-06-05 14:42:12,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 340 transitions. [2021-06-05 14:42:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:12,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:12,664 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:12,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17074,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:12,864 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash -410375946, now seen corresponding path program 303 times [2021-06-05 14:42:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053570602] [2021-06-05 14:42:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:12,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:12,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053570602] [2021-06-05 14:42:12,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053570602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:12,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607734923] [2021-06-05 14:42:12,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:13,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:13,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:13,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:13,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:13,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:13,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:13,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:13,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,290 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-06-05 14:42:13,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:13,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:13,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:13,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:13,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:13,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:13,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:13,356 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:42:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:13,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607734923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:13,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:13,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:42:13,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144498130] [2021-06-05 14:42:13,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:42:13,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:42:13,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:42:13,385 INFO L87 Difference]: Start difference. First operand 159 states and 340 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:13,608 INFO L93 Difference]: Finished difference Result 176 states and 372 transitions. [2021-06-05 14:42:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:13,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:13,609 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:42:13,609 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:42:13,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:42:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2021-06-05 14:42:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 14:42:13,610 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 14:42:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:13,610 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 14:42:13,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 14:42:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:13,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:13,611 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:13,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17083,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:13,811 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash 324225371, now seen corresponding path program 304 times [2021-06-05 14:42:13,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:13,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171231990] [2021-06-05 14:42:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:13,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:13,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171231990] [2021-06-05 14:42:13,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171231990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:13,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339913060] [2021-06-05 14:42:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:13,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:13,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:14,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339913060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:14,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:14,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:14,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692952857] [2021-06-05 14:42:14,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:14,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:14,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:14,138 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:14,364 INFO L93 Difference]: Finished difference Result 194 states and 408 transitions. [2021-06-05 14:42:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:42:14,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:14,364 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:42:14,364 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:42:14,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:42:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 156. [2021-06-05 14:42:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 14:42:14,366 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 14:42:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:14,366 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 14:42:14,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 14:42:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:14,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:14,366 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:14,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17107,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:14,573 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1060952375, now seen corresponding path program 305 times [2021-06-05 14:42:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:14,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656498807] [2021-06-05 14:42:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:14,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:14,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656498807] [2021-06-05 14:42:14,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656498807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:14,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398007313] [2021-06-05 14:42:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:14,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:14,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:14,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398007313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:14,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:14,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:42:14,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615194635] [2021-06-05 14:42:14,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:42:14,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:42:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:42:14,895 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:15,253 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-06-05 14:42:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:42:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:15,254 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:42:15,254 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 14:42:15,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 14:42:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 157. [2021-06-05 14:42:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 14:42:15,256 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 14:42:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:15,256 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 14:42:15,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 14:42:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:15,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:15,256 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:15,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17137 [2021-06-05 14:42:15,457 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash -376746465, now seen corresponding path program 306 times [2021-06-05 14:42:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:15,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623049350] [2021-06-05 14:42:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:15,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623049350] [2021-06-05 14:42:15,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623049350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413406489] [2021-06-05 14:42:15,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:42:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:15,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413406489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:15,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:42:15,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876792009] [2021-06-05 14:42:15,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:42:15,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:15,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:42:15,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:42:15,796 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:16,187 INFO L93 Difference]: Finished difference Result 221 states and 463 transitions. [2021-06-05 14:42:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:42:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:16,187 INFO L225 Difference]: With dead ends: 221 [2021-06-05 14:42:16,187 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:42:16,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:42:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:42:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2021-06-05 14:42:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 14:42:16,189 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 14:42:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:16,189 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 14:42:16,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 14:42:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:16,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:16,189 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:16,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17166 [2021-06-05 14:42:16,390 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1772162720, now seen corresponding path program 307 times [2021-06-05 14:42:16,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:16,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452773833] [2021-06-05 14:42:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:16,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452773833] [2021-06-05 14:42:16,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452773833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690290481] [2021-06-05 14:42:16,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:16,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:16,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:16,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,831 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:42:16,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:16,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:16,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:16,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:16,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:16,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:16,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:16,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:16,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:16,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:16,993 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:17,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:17,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:17,020 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:17,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:17,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:17,044 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:42:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:17,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690290481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:17,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:17,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:42:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024822957] [2021-06-05 14:42:17,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:42:17,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:42:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:42:17,074 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:17,318 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 14:42:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:17,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:17,319 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:42:17,319 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:42:17,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:42:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 155. [2021-06-05 14:42:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 14:42:17,320 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 14:42:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:17,320 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 14:42:17,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 14:42:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:17,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:17,321 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:17,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17198,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:17,521 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -20716577, now seen corresponding path program 308 times [2021-06-05 14:42:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697895221] [2021-06-05 14:42:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:17,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:17,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697895221] [2021-06-05 14:42:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697895221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:17,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390294148] [2021-06-05 14:42:17,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:17,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:17,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:17,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:17,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390294148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:17,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:17,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:17,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352304896] [2021-06-05 14:42:17,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:17,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:17,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:17,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:17,825 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:18,188 INFO L93 Difference]: Finished difference Result 205 states and 430 transitions. [2021-06-05 14:42:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:42:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:18,188 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:42:18,189 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:42:18,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:42:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:42:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2021-06-05 14:42:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1481481481481484) internal successors, (348), 162 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 348 transitions. [2021-06-05 14:42:18,190 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 348 transitions. Word has length 19 [2021-06-05 14:42:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:18,190 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 348 transitions. [2021-06-05 14:42:18,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 348 transitions. [2021-06-05 14:42:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:18,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:18,191 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:18,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17220 [2021-06-05 14:42:18,391 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1035231055, now seen corresponding path program 309 times [2021-06-05 14:42:18,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:18,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465296610] [2021-06-05 14:42:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:18,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:18,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465296610] [2021-06-05 14:42:18,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465296610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:18,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967923590] [2021-06-05 14:42:18,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:18,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:18,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:18,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:18,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:18,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967923590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:18,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:18,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:18,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320353440] [2021-06-05 14:42:18,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:18,761 INFO L87 Difference]: Start difference. First operand 163 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:19,180 INFO L93 Difference]: Finished difference Result 230 states and 481 transitions. [2021-06-05 14:42:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:42:19,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:19,181 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:42:19,181 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 14:42:19,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:42:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 14:42:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 162. [2021-06-05 14:42:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 14:42:19,182 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 14:42:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:19,182 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 14:42:19,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 14:42:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:19,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:19,183 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:19,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17240,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:19,383 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1482568778, now seen corresponding path program 310 times [2021-06-05 14:42:19,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:19,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287444621] [2021-06-05 14:42:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:19,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:19,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287444621] [2021-06-05 14:42:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287444621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:19,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902168642] [2021-06-05 14:42:19,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:19,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:19,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:19,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:19,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,807 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:42:19,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:19,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:19,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:19,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:19,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:19,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:19,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:19,909 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:19,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:19,939 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:19,967 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:19,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:19,995 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:20,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:20,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:20,019 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:42:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:20,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902168642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:20,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:20,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:20,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568840328] [2021-06-05 14:42:20,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:20,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:20,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:20,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:20,048 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:20,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:20,342 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-06-05 14:42:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:42:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:20,343 INFO L225 Difference]: With dead ends: 187 [2021-06-05 14:42:20,343 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 14:42:20,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 14:42:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 160. [2021-06-05 14:42:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 14:42:20,344 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 14:42:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:20,344 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 14:42:20,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 14:42:20,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:20,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:20,345 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:20,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17284,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:20,545 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash -447485733, now seen corresponding path program 311 times [2021-06-05 14:42:20,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:20,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217595824] [2021-06-05 14:42:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:20,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:20,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217595824] [2021-06-05 14:42:20,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217595824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:20,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057749591] [2021-06-05 14:42:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:20,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:20,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:20,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:20,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057749591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:20,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:20,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:20,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519758437] [2021-06-05 14:42:20,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:20,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:20,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:20,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:20,893 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:21,121 INFO L93 Difference]: Finished difference Result 213 states and 442 transitions. [2021-06-05 14:42:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:42:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:21,121 INFO L225 Difference]: With dead ends: 213 [2021-06-05 14:42:21,121 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:42:21,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:42:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:42:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 162. [2021-06-05 14:42:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1614906832298137) internal successors, (348), 161 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 348 transitions. [2021-06-05 14:42:21,123 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 348 transitions. Word has length 19 [2021-06-05 14:42:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:21,123 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 348 transitions. [2021-06-05 14:42:21,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 348 transitions. [2021-06-05 14:42:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:21,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:21,123 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:21,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17306 [2021-06-05 14:42:21,324 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash -894823456, now seen corresponding path program 312 times [2021-06-05 14:42:21,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:21,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204935879] [2021-06-05 14:42:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:21,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204935879] [2021-06-05 14:42:21,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204935879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30714213] [2021-06-05 14:42:21,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:21,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:42:21,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:21,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:21,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:21,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:21,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:21,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:21,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:21,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:21,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:21,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:21,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:21,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:21,737 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:21,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,771 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 14:42:21,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:21,774 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:21,797 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:42:21,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:21,798 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:42:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:21,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30714213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:21,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:21,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:21,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129234506] [2021-06-05 14:42:21,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:21,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:21,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:21,820 INFO L87 Difference]: Start difference. First operand 162 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:22,169 INFO L93 Difference]: Finished difference Result 248 states and 509 transitions. [2021-06-05 14:42:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:42:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:22,170 INFO L225 Difference]: With dead ends: 248 [2021-06-05 14:42:22,170 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 14:42:22,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:42:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 14:42:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 159. [2021-06-05 14:42:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1772151898734178) internal successors, (344), 158 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 344 transitions. [2021-06-05 14:42:22,172 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 344 transitions. Word has length 19 [2021-06-05 14:42:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:22,172 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 344 transitions. [2021-06-05 14:42:22,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 344 transitions. [2021-06-05 14:42:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:22,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:22,172 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:22,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17342 [2021-06-05 14:42:22,385 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1430053258, now seen corresponding path program 313 times [2021-06-05 14:42:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:22,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863337210] [2021-06-05 14:42:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:22,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:22,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863337210] [2021-06-05 14:42:22,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863337210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:22,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282304819] [2021-06-05 14:42:22,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:22,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:22,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:22,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:22,702 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:42:22,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:22,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:22,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:22,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:42:22,709 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:42:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:22,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282304819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:22,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:22,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:22,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37990740] [2021-06-05 14:42:22,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:22,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:22,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:22,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:22,715 INFO L87 Difference]: Start difference. First operand 159 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:22,966 INFO L93 Difference]: Finished difference Result 202 states and 425 transitions. [2021-06-05 14:42:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:42:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:22,967 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:42:22,967 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:42:22,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:42:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 157. [2021-06-05 14:42:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.16025641025641) internal successors, (337), 156 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 337 transitions. [2021-06-05 14:42:22,968 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 337 transitions. Word has length 19 [2021-06-05 14:42:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:22,969 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 337 transitions. [2021-06-05 14:42:22,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 337 transitions. [2021-06-05 14:42:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:22,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:22,969 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:23,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17427,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:23,169 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1794773793, now seen corresponding path program 314 times [2021-06-05 14:42:23,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:23,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411408871] [2021-06-05 14:42:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:23,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411408871] [2021-06-05 14:42:23,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411408871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408107036] [2021-06-05 14:42:23,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:23,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:23,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:23,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408107036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641013030] [2021-06-05 14:42:23,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:23,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:23,488 INFO L87 Difference]: Start difference. First operand 157 states and 337 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:23,732 INFO L93 Difference]: Finished difference Result 175 states and 368 transitions. [2021-06-05 14:42:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:42:23,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:23,732 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:42:23,732 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 14:42:23,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 14:42:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2021-06-05 14:42:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 14:42:23,734 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 14:42:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:23,734 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 14:42:23,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 14:42:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:23,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:23,734 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:23,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17450,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:23,934 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:23,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1170864497, now seen corresponding path program 315 times [2021-06-05 14:42:23,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:23,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550898727] [2021-06-05 14:42:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:24,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550898727] [2021-06-05 14:42:24,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550898727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73327770] [2021-06-05 14:42:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:24,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:24,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:24,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73327770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:24,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:42:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703941518] [2021-06-05 14:42:24,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:42:24,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:42:24,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:42:24,185 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:24,337 INFO L93 Difference]: Finished difference Result 183 states and 387 transitions. [2021-06-05 14:42:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:24,338 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:42:24,338 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:42:24,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:42:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 14:42:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 14:42:24,339 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 14:42:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:24,339 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 14:42:24,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 14:42:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:24,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:24,340 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:24,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17468 [2021-06-05 14:42:24,549 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1180027331, now seen corresponding path program 316 times [2021-06-05 14:42:24,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:24,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811663557] [2021-06-05 14:42:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811663557] [2021-06-05 14:42:24,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811663557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391094081] [2021-06-05 14:42:24,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:24,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:24,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:24,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391094081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:24,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:24,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728123602] [2021-06-05 14:42:24,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:24,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:24,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:24,810 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:25,016 INFO L93 Difference]: Finished difference Result 205 states and 431 transitions. [2021-06-05 14:42:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:25,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:25,016 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:42:25,016 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:42:25,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:42:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2021-06-05 14:42:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.151898734177215) internal successors, (340), 158 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 340 transitions. [2021-06-05 14:42:25,018 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 340 transitions. Word has length 19 [2021-06-05 14:42:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:25,018 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 340 transitions. [2021-06-05 14:42:25,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 340 transitions. [2021-06-05 14:42:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:25,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:25,018 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:25,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17472 [2021-06-05 14:42:25,219 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash -205150415, now seen corresponding path program 317 times [2021-06-05 14:42:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:25,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640409815] [2021-06-05 14:42:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:25,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:25,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640409815] [2021-06-05 14:42:25,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640409815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:25,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092018389] [2021-06-05 14:42:25,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:25,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:25,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:25,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:25,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:25,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092018389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:25,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:25,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:42:25,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206947764] [2021-06-05 14:42:25,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:42:25,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:25,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:42:25,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:25,557 INFO L87 Difference]: Start difference. First operand 159 states and 340 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:25,946 INFO L93 Difference]: Finished difference Result 220 states and 461 transitions. [2021-06-05 14:42:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:42:25,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:25,946 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:42:25,946 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:42:25,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:42:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 160. [2021-06-05 14:42:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 14:42:25,948 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 14:42:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:25,948 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 14:42:25,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 14:42:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:25,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:25,948 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:26,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17476 [2021-06-05 14:42:26,149 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1219664893, now seen corresponding path program 318 times [2021-06-05 14:42:26,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:26,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013409590] [2021-06-05 14:42:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:26,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:26,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013409590] [2021-06-05 14:42:26,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013409590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:26,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041492795] [2021-06-05 14:42:26,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:26,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:42:26,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:26,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041492795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:26,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:26,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:42:26,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776446063] [2021-06-05 14:42:26,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:26,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:26,406 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:26,656 INFO L93 Difference]: Finished difference Result 215 states and 451 transitions. [2021-06-05 14:42:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:26,656 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:42:26,656 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:42:26,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:42:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 161. [2021-06-05 14:42:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.15) internal successors, (344), 160 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 344 transitions. [2021-06-05 14:42:26,658 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 344 transitions. Word has length 19 [2021-06-05 14:42:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:26,658 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 344 transitions. [2021-06-05 14:42:26,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 344 transitions. [2021-06-05 14:42:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:26,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:26,658 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:26,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17497 [2021-06-05 14:42:26,859 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1667002616, now seen corresponding path program 319 times [2021-06-05 14:42:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:26,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240241051] [2021-06-05 14:42:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:26,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240241051] [2021-06-05 14:42:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240241051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414163008] [2021-06-05 14:42:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:27,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:27,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:27,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:27,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:27,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,368 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:42:27,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:27,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:27,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:27,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:27,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:27,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:27,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:27,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:27,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:27,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:27,527 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:27,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:27,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:27,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:27,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:27,579 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:42:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:27,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414163008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:27,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:27,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:42:27,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295063694] [2021-06-05 14:42:27,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:42:27,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:42:27,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:27,609 INFO L87 Difference]: Start difference. First operand 161 states and 344 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:27,827 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-06-05 14:42:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:27,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:27,828 INFO L225 Difference]: With dead ends: 187 [2021-06-05 14:42:27,828 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 14:42:27,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 14:42:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 157. [2021-06-05 14:42:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1538461538461537) internal successors, (336), 156 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 336 transitions. [2021-06-05 14:42:27,830 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 336 transitions. Word has length 19 [2021-06-05 14:42:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:27,830 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 336 transitions. [2021-06-05 14:42:27,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 336 transitions. [2021-06-05 14:42:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:27,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:27,830 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:28,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17507,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,030 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1993179389, now seen corresponding path program 320 times [2021-06-05 14:42:28,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:28,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784300829] [2021-06-05 14:42:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:28,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784300829] [2021-06-05 14:42:28,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784300829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370726139] [2021-06-05 14:42:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:28,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:28,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370726139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:28,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:28,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:28,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768598637] [2021-06-05 14:42:28,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:28,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:28,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:28,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:28,364 INFO L87 Difference]: Start difference. First operand 157 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:28,584 INFO L93 Difference]: Finished difference Result 211 states and 443 transitions. [2021-06-05 14:42:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:28,585 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:42:28,585 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:42:28,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:42:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2021-06-05 14:42:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 14:42:28,587 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 14:42:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:28,587 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 14:42:28,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 14:42:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:28,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:28,587 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:28,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17530,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,787 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash 916610161, now seen corresponding path program 321 times [2021-06-05 14:42:28,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:28,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063066554] [2021-06-05 14:42:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:28,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:28,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063066554] [2021-06-05 14:42:28,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063066554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:28,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126267212] [2021-06-05 14:42:28,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:29,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126267212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:29,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:29,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:29,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983691278] [2021-06-05 14:42:29,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:29,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:29,120 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:29,481 INFO L93 Difference]: Finished difference Result 232 states and 485 transitions. [2021-06-05 14:42:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:42:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:29,482 INFO L225 Difference]: With dead ends: 232 [2021-06-05 14:42:29,482 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 14:42:29,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:42:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 14:42:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 162. [2021-06-05 14:42:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 14:42:29,484 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 14:42:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:29,484 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 14:42:29,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 14:42:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:29,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:29,484 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:29,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17549,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:29,684 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash -97904317, now seen corresponding path program 322 times [2021-06-05 14:42:29,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:29,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075097615] [2021-06-05 14:42:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:29,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:29,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075097615] [2021-06-05 14:42:29,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075097615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:29,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760947507] [2021-06-05 14:42:29,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:29,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:29,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:29,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:30,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760947507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:30,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:30,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:30,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711412249] [2021-06-05 14:42:30,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:30,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:30,157 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:30,683 INFO L93 Difference]: Finished difference Result 246 states and 514 transitions. [2021-06-05 14:42:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:42:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:30,684 INFO L225 Difference]: With dead ends: 246 [2021-06-05 14:42:30,684 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 14:42:30,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:42:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 14:42:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 160. [2021-06-05 14:42:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 14:42:30,686 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 19 [2021-06-05 14:42:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:30,686 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 14:42:30,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 14:42:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:30,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:30,686 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:30,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17580,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:30,886 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash -545242040, now seen corresponding path program 323 times [2021-06-05 14:42:30,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:30,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777103082] [2021-06-05 14:42:30,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:30,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:30,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777103082] [2021-06-05 14:42:30,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777103082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:30,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479183739] [2021-06-05 14:42:30,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:31,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:31,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:31,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:31,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:31,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:31,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:31,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:31,319 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-06-05 14:42:31,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:31,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:31,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:31,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:31,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:31,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:31,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:31,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:31,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:31,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:31,383 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:42:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:31,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479183739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:31,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:31,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:31,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585973530] [2021-06-05 14:42:31,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:31,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:31,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:31,413 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:31,641 INFO L93 Difference]: Finished difference Result 183 states and 387 transitions. [2021-06-05 14:42:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:42:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:31,642 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:42:31,642 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:42:31,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:42:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2021-06-05 14:42:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-06-05 14:42:31,643 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 19 [2021-06-05 14:42:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:31,643 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-06-05 14:42:31,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-06-05 14:42:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:31,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:31,643 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:31,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17651 [2021-06-05 14:42:31,844 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash -155582671, now seen corresponding path program 324 times [2021-06-05 14:42:31,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:31,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945477178] [2021-06-05 14:42:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:31,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:31,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945477178] [2021-06-05 14:42:31,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945477178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:31,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733828613] [2021-06-05 14:42:31,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:32,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:32,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:32,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:32,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733828613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:32,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:32,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:32,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604500884] [2021-06-05 14:42:32,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:32,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:32,166 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:32,415 INFO L93 Difference]: Finished difference Result 207 states and 435 transitions. [2021-06-05 14:42:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:42:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:32,416 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:42:32,416 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 14:42:32,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 14:42:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2021-06-05 14:42:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 14:42:32,418 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 14:42:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:32,418 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 14:42:32,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 14:42:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:32,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:32,418 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:32,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17674 [2021-06-05 14:42:32,618 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash 528623239, now seen corresponding path program 325 times [2021-06-05 14:42:32,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:32,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99978610] [2021-06-05 14:42:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:32,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:32,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99978610] [2021-06-05 14:42:32,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99978610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:32,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705582374] [2021-06-05 14:42:32,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:32,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:32,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:32,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705582374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:32,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:32,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:32,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832970731] [2021-06-05 14:42:32,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:32,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:32,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:32,972 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:33,205 INFO L93 Difference]: Finished difference Result 229 states and 480 transitions. [2021-06-05 14:42:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:42:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:33,205 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:42:33,205 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 14:42:33,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 14:42:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2021-06-05 14:42:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-06-05 14:42:33,207 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-06-05 14:42:33,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:33,207 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-06-05 14:42:33,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-06-05 14:42:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:33,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:33,207 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:33,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17704 [2021-06-05 14:42:33,408 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:33,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1617434872, now seen corresponding path program 326 times [2021-06-05 14:42:33,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:33,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205802010] [2021-06-05 14:42:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:33,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:33,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205802010] [2021-06-05 14:42:33,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205802010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:33,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555677763] [2021-06-05 14:42:33,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:33,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:33,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:33,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:33,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:33,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:33,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,830 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-06-05 14:42:33,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:33,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:33,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:33,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:33,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:33,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:33,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:33,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:33,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:34,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:34,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:34,018 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:34,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:34,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:34,042 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:42:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:34,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555677763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:34,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:34,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:34,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275819928] [2021-06-05 14:42:34,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:34,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:34,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:34,071 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:34,286 INFO L93 Difference]: Finished difference Result 190 states and 404 transitions. [2021-06-05 14:42:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:42:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:34,287 INFO L225 Difference]: With dead ends: 190 [2021-06-05 14:42:34,287 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 14:42:34,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 14:42:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-06-05 14:42:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-06-05 14:42:34,288 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 19 [2021-06-05 14:42:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:34,288 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-06-05 14:42:34,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-06-05 14:42:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:34,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:34,289 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:34,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17743 [2021-06-05 14:42:34,489 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash -582351827, now seen corresponding path program 327 times [2021-06-05 14:42:34,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:34,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978123434] [2021-06-05 14:42:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:34,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:34,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978123434] [2021-06-05 14:42:34,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978123434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:34,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003154560] [2021-06-05 14:42:34,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:34,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:34,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:34,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:34,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:34,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003154560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:34,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:34,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812563101] [2021-06-05 14:42:34,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:34,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:34,857 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:35,077 INFO L93 Difference]: Finished difference Result 202 states and 419 transitions. [2021-06-05 14:42:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:35,077 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:42:35,077 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:42:35,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:42:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 158. [2021-06-05 14:42:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.159235668789809) internal successors, (339), 157 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 339 transitions. [2021-06-05 14:42:35,079 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 339 transitions. Word has length 19 [2021-06-05 14:42:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:35,079 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 339 transitions. [2021-06-05 14:42:35,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 339 transitions. [2021-06-05 14:42:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:35,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:35,079 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:35,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17764,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:35,280 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1029689550, now seen corresponding path program 328 times [2021-06-05 14:42:35,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:35,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813635837] [2021-06-05 14:42:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:35,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:35,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813635837] [2021-06-05 14:42:35,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813635837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:35,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279166106] [2021-06-05 14:42:35,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:35,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:35,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:35,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:35,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:35,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:35,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:35,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:35,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:35,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:35,644 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:42:35,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:35,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:35,669 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:42:35,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:35,670 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:42:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:35,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279166106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:35,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:35,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:35,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593362852] [2021-06-05 14:42:35,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:35,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:35,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:35,692 INFO L87 Difference]: Start difference. First operand 158 states and 339 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:36,082 INFO L93 Difference]: Finished difference Result 239 states and 490 transitions. [2021-06-05 14:42:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:42:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:36,082 INFO L225 Difference]: With dead ends: 239 [2021-06-05 14:42:36,082 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 14:42:36,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:42:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 14:42:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 159. [2021-06-05 14:42:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1772151898734178) internal successors, (344), 158 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 344 transitions. [2021-06-05 14:42:36,084 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 344 transitions. Word has length 19 [2021-06-05 14:42:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:36,084 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 344 transitions. [2021-06-05 14:42:36,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 344 transitions. [2021-06-05 14:42:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:36,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:36,084 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:36,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17800,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:36,285 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:36,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1564919352, now seen corresponding path program 329 times [2021-06-05 14:42:36,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:36,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563302393] [2021-06-05 14:42:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:36,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:36,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563302393] [2021-06-05 14:42:36,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563302393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:36,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292108333] [2021-06-05 14:42:36,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:36,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:36,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:36,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:36,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:36,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:36,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:36,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:36,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,608 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:42:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:36,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:36,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,615 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:42:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:36,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292108333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:36,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:36,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:36,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941727269] [2021-06-05 14:42:36,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:36,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:36,621 INFO L87 Difference]: Start difference. First operand 159 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:36,879 INFO L93 Difference]: Finished difference Result 196 states and 414 transitions. [2021-06-05 14:42:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:36,880 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:42:36,880 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:42:36,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:42:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2021-06-05 14:42:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.16025641025641) internal successors, (337), 156 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 337 transitions. [2021-06-05 14:42:36,882 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 337 transitions. Word has length 19 [2021-06-05 14:42:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:36,882 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 337 transitions. [2021-06-05 14:42:36,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 337 transitions. [2021-06-05 14:42:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:36,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:36,882 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:37,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17839,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:37,083 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1929639887, now seen corresponding path program 330 times [2021-06-05 14:42:37,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:37,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724202732] [2021-06-05 14:42:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:37,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:37,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724202732] [2021-06-05 14:42:37,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724202732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:37,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367897261] [2021-06-05 14:42:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:37,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:42:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:37,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:37,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367897261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:37,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:37,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:37,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001208678] [2021-06-05 14:42:37,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:37,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:37,425 INFO L87 Difference]: Start difference. First operand 157 states and 337 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:37,619 INFO L93 Difference]: Finished difference Result 172 states and 362 transitions. [2021-06-05 14:42:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:37,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:37,620 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:42:37,620 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 14:42:37,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 14:42:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 155. [2021-06-05 14:42:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-06-05 14:42:37,621 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 19 [2021-06-05 14:42:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:37,621 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-06-05 14:42:37,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-06-05 14:42:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:37,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:37,622 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:37,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17861 [2021-06-05 14:42:37,822 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash 457883971, now seen corresponding path program 331 times [2021-06-05 14:42:37,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:37,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842239362] [2021-06-05 14:42:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:37,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842239362] [2021-06-05 14:42:37,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842239362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150562214] [2021-06-05 14:42:37,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:37,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:38,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150562214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:38,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:38,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912591189] [2021-06-05 14:42:38,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:38,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:38,224 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:38,481 INFO L93 Difference]: Finished difference Result 209 states and 436 transitions. [2021-06-05 14:42:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:42:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:38,481 INFO L225 Difference]: With dead ends: 209 [2021-06-05 14:42:38,481 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 14:42:38,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 14:42:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 156. [2021-06-05 14:42:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.167741935483871) internal successors, (336), 155 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 336 transitions. [2021-06-05 14:42:38,483 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 336 transitions. Word has length 19 [2021-06-05 14:42:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:38,483 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 336 transitions. [2021-06-05 14:42:38,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 336 transitions. [2021-06-05 14:42:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:38,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:38,483 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:38,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17888,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,683 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:38,684 INFO L82 PathProgramCache]: Analyzing trace with hash 10546248, now seen corresponding path program 332 times [2021-06-05 14:42:38,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:38,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069959412] [2021-06-05 14:42:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:38,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:38,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069959412] [2021-06-05 14:42:38,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069959412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:38,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908799376] [2021-06-05 14:42:38,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:38,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:38,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:38,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:39,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:39,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:39,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:39,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:39,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:39,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:39,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:39,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:39,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:39,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:39,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:39,161 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:39,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,216 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:42:39,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:39,218 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:39,241 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:42:39,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:39,242 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:42:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:39,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908799376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:39,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:39,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:39,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841803265] [2021-06-05 14:42:39,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:39,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:39,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:39,264 INFO L87 Difference]: Start difference. First operand 156 states and 336 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:39,757 INFO L93 Difference]: Finished difference Result 244 states and 499 transitions. [2021-06-05 14:42:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:42:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:39,758 INFO L225 Difference]: With dead ends: 244 [2021-06-05 14:42:39,758 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 14:42:39,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:42:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 14:42:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 158. [2021-06-05 14:42:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 157 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 344 transitions. [2021-06-05 14:42:39,759 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 344 transitions. Word has length 19 [2021-06-05 14:42:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:39,759 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 344 transitions. [2021-06-05 14:42:39,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 344 transitions. [2021-06-05 14:42:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:39,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:39,760 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:39,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17946 [2021-06-05 14:42:39,973 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash -524683554, now seen corresponding path program 333 times [2021-06-05 14:42:39,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:39,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934405176] [2021-06-05 14:42:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:40,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934405176] [2021-06-05 14:42:40,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934405176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820731102] [2021-06-05 14:42:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:40,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:40,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:40,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:40,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:40,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:40,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:40,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,298 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:42:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:40,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:40,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,304 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:42:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:40,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820731102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:40,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:40,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841963324] [2021-06-05 14:42:40,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:40,311 INFO L87 Difference]: Start difference. First operand 158 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:40,616 INFO L93 Difference]: Finished difference Result 200 states and 421 transitions. [2021-06-05 14:42:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:40,616 INFO L225 Difference]: With dead ends: 200 [2021-06-05 14:42:40,616 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 14:42:40,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 14:42:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2021-06-05 14:42:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 157 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 344 transitions. [2021-06-05 14:42:40,618 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 344 transitions. Word has length 19 [2021-06-05 14:42:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:40,618 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 344 transitions. [2021-06-05 14:42:40,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 344 transitions. [2021-06-05 14:42:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:40,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:40,618 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:40,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18057,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:40,819 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:40,819 INFO L82 PathProgramCache]: Analyzing trace with hash -889404089, now seen corresponding path program 334 times [2021-06-05 14:42:40,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:40,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036889038] [2021-06-05 14:42:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:40,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036889038] [2021-06-05 14:42:40,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036889038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186674702] [2021-06-05 14:42:40,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:40,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:41,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186674702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:41,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:41,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:41,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7168340] [2021-06-05 14:42:41,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:41,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:41,138 INFO L87 Difference]: Start difference. First operand 158 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:41,431 INFO L93 Difference]: Finished difference Result 183 states and 387 transitions. [2021-06-05 14:42:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:42:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:41,432 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:42:41,432 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:42:41,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:42:41,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 157. [2021-06-05 14:42:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1858974358974357) internal successors, (341), 156 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 341 transitions. [2021-06-05 14:42:41,433 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 341 transitions. Word has length 19 [2021-06-05 14:42:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:41,433 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 341 transitions. [2021-06-05 14:42:41,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 341 transitions. [2021-06-05 14:42:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:41,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:41,434 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:41,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18080,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:41,634 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 63061768, now seen corresponding path program 335 times [2021-06-05 14:42:41,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:41,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111368202] [2021-06-05 14:42:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:41,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:41,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111368202] [2021-06-05 14:42:41,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111368202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:41,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979604829] [2021-06-05 14:42:41,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:41,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:41,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:41,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:41,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:41,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:41,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:41,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,992 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:42:41,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:41,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:41,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,999 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:42:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:42,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979604829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:42,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:42,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144497556] [2021-06-05 14:42:42,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:42,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:42,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:42,006 INFO L87 Difference]: Start difference. First operand 157 states and 341 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:42,248 INFO L93 Difference]: Finished difference Result 194 states and 411 transitions. [2021-06-05 14:42:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:42,249 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:42:42,249 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:42:42,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:42:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 160. [2021-06-05 14:42:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-06-05 14:42:42,250 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-06-05 14:42:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:42,250 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-06-05 14:42:42,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-06-05 14:42:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:42,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:42,251 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:42,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18098,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:42,451 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:42,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1902096621, now seen corresponding path program 336 times [2021-06-05 14:42:42,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:42,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206772656] [2021-06-05 14:42:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:42,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:42,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206772656] [2021-06-05 14:42:42,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206772656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697042169] [2021-06-05 14:42:42,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:42,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:42:42,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:42,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697042169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:42,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:42:42,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867738837] [2021-06-05 14:42:42,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:42,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:42,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:42,758 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:42,951 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2021-06-05 14:42:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:42,952 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:42:42,952 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:42:42,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:42:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-06-05 14:42:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1761006289308176) internal successors, (346), 159 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 346 transitions. [2021-06-05 14:42:42,953 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 346 transitions. Word has length 19 [2021-06-05 14:42:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:42,953 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 346 transitions. [2021-06-05 14:42:42,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 346 transitions. [2021-06-05 14:42:42,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:42,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:42,954 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:43,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18139 [2021-06-05 14:42:43,154 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:43,154 INFO L82 PathProgramCache]: Analyzing trace with hash 870143391, now seen corresponding path program 337 times [2021-06-05 14:42:43,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:43,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095322371] [2021-06-05 14:42:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:43,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095322371] [2021-06-05 14:42:43,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095322371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226416559] [2021-06-05 14:42:43,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:43,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:43,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:43,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226416559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:43,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:43,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:43,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374549241] [2021-06-05 14:42:43,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:43,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:43,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:43,489 INFO L87 Difference]: Start difference. First operand 160 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:43,668 INFO L93 Difference]: Finished difference Result 183 states and 392 transitions. [2021-06-05 14:42:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:43,669 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:42:43,669 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:42:43,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:42:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 160. [2021-06-05 14:42:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1761006289308176) internal successors, (346), 159 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 346 transitions. [2021-06-05 14:42:43,670 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 346 transitions. Word has length 19 [2021-06-05 14:42:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:43,671 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 346 transitions. [2021-06-05 14:42:43,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 346 transitions. [2021-06-05 14:42:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:43,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:43,671 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:43,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18158 [2021-06-05 14:42:43,871 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash 879306225, now seen corresponding path program 338 times [2021-06-05 14:42:43,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:43,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434319663] [2021-06-05 14:42:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:43,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434319663] [2021-06-05 14:42:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434319663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150460037] [2021-06-05 14:42:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:44,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:44,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:44,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:44,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150460037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:44,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:44,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:44,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881743965] [2021-06-05 14:42:44,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:44,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:44,228 INFO L87 Difference]: Start difference. First operand 160 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:44,509 INFO L93 Difference]: Finished difference Result 205 states and 436 transitions. [2021-06-05 14:42:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:44,510 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:42:44,510 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:42:44,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:42:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 161. [2021-06-05 14:42:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.175) internal successors, (348), 160 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 348 transitions. [2021-06-05 14:42:44,511 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 348 transitions. Word has length 19 [2021-06-05 14:42:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:44,511 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 348 transitions. [2021-06-05 14:42:44,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 348 transitions. [2021-06-05 14:42:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:44,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:44,512 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:44,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18174,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:44,712 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:44,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:44,712 INFO L82 PathProgramCache]: Analyzing trace with hash -505871521, now seen corresponding path program 339 times [2021-06-05 14:42:44,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:44,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696879195] [2021-06-05 14:42:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:44,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:44,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696879195] [2021-06-05 14:42:44,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696879195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:44,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956715787] [2021-06-05 14:42:44,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:44,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:44,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:44,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956715787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:45,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:45,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007072070] [2021-06-05 14:42:45,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:45,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:45,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:45,090 INFO L87 Difference]: Start difference. First operand 161 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:45,537 INFO L93 Difference]: Finished difference Result 215 states and 456 transitions. [2021-06-05 14:42:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:45,538 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:42:45,538 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:42:45,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:42:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:42:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2021-06-05 14:42:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1739130434782608) internal successors, (350), 161 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 350 transitions. [2021-06-05 14:42:45,540 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 350 transitions. Word has length 19 [2021-06-05 14:42:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:45,540 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 350 transitions. [2021-06-05 14:42:45,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 350 transitions. [2021-06-05 14:42:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:45,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:45,540 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:45,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18193,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:45,740 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1520385999, now seen corresponding path program 340 times [2021-06-05 14:42:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:45,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531748647] [2021-06-05 14:42:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:45,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531748647] [2021-06-05 14:42:45,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531748647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936468529] [2021-06-05 14:42:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:45,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936468529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:46,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:46,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:46,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378503378] [2021-06-05 14:42:46,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:46,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:46,221 INFO L87 Difference]: Start difference. First operand 162 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:46,679 INFO L93 Difference]: Finished difference Result 220 states and 466 transitions. [2021-06-05 14:42:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:46,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:46,680 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:42:46,680 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:42:46,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:42:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:42:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2021-06-05 14:42:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1772151898734178) internal successors, (344), 158 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 344 transitions. [2021-06-05 14:42:46,681 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 344 transitions. Word has length 19 [2021-06-05 14:42:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:46,682 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 344 transitions. [2021-06-05 14:42:46,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 344 transitions. [2021-06-05 14:42:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:46,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:46,682 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:46,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18219,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:46,882 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1233122405, now seen corresponding path program 341 times [2021-06-05 14:42:46,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:46,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786001239] [2021-06-05 14:42:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:46,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:46,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786001239] [2021-06-05 14:42:46,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786001239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:46,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075788639] [2021-06-05 14:42:46,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:47,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:47,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075788639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:47,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:47,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:47,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968639821] [2021-06-05 14:42:47,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:47,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:47,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:47,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:47,228 INFO L87 Difference]: Start difference. First operand 159 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:47,422 INFO L93 Difference]: Finished difference Result 194 states and 414 transitions. [2021-06-05 14:42:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:47,422 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:42:47,422 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:42:47,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:42:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 160. [2021-06-05 14:42:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1761006289308176) internal successors, (346), 159 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 346 transitions. [2021-06-05 14:42:47,424 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 346 transitions. Word has length 19 [2021-06-05 14:42:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:47,424 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 346 transitions. [2021-06-05 14:42:47,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 346 transitions. [2021-06-05 14:42:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:47,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:47,424 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:47,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18288,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:47,624 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:47,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:47,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1676667145, now seen corresponding path program 342 times [2021-06-05 14:42:47,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:47,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855316260] [2021-06-05 14:42:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:47,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855316260] [2021-06-05 14:42:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855316260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570224923] [2021-06-05 14:42:47,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:47,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:42:47,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:47,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:47,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570224923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:47,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:47,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:47,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023653949] [2021-06-05 14:42:47,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:47,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:47,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:47,992 INFO L87 Difference]: Start difference. First operand 160 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:48,358 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-06-05 14:42:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:48,359 INFO L225 Difference]: With dead ends: 210 [2021-06-05 14:42:48,359 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 14:42:48,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:42:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 14:42:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 161. [2021-06-05 14:42:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.175) internal successors, (348), 160 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 348 transitions. [2021-06-05 14:42:48,360 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 348 transitions. Word has length 19 [2021-06-05 14:42:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:48,360 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 348 transitions. [2021-06-05 14:42:48,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 348 transitions. [2021-06-05 14:42:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:48,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:48,361 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:48,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18304 [2021-06-05 14:42:48,561 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1934094241, now seen corresponding path program 343 times [2021-06-05 14:42:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:48,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577387578] [2021-06-05 14:42:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:48,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577387578] [2021-06-05 14:42:48,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577387578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692234960] [2021-06-05 14:42:48,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:48,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692234960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:48,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:48,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:48,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289591165] [2021-06-05 14:42:48,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:48,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:48,993 INFO L87 Difference]: Start difference. First operand 161 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:49,388 INFO L93 Difference]: Finished difference Result 221 states and 469 transitions. [2021-06-05 14:42:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:49,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:49,389 INFO L225 Difference]: With dead ends: 221 [2021-06-05 14:42:49,389 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:42:49,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:42:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:42:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2021-06-05 14:42:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1739130434782608) internal successors, (350), 161 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 350 transitions. [2021-06-05 14:42:49,391 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 350 transitions. Word has length 19 [2021-06-05 14:42:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:49,391 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 350 transitions. [2021-06-05 14:42:49,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 350 transitions. [2021-06-05 14:42:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:49,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:49,391 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:49,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18330,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:49,591 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:49,592 INFO L82 PathProgramCache]: Analyzing trace with hash 214814944, now seen corresponding path program 344 times [2021-06-05 14:42:49,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:49,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857665928] [2021-06-05 14:42:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:49,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:49,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857665928] [2021-06-05 14:42:49,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857665928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:49,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401372385] [2021-06-05 14:42:49,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:49,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:49,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:49,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:49,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:49,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:49,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:49,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,037 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-06-05 14:42:50,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:50,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:50,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:50,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:50,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:50,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:50,102 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:42:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401372385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:50,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:50,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:50,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610929552] [2021-06-05 14:42:50,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:50,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:50,133 INFO L87 Difference]: Start difference. First operand 162 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:50,313 INFO L93 Difference]: Finished difference Result 173 states and 372 transitions. [2021-06-05 14:42:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:50,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:50,313 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:42:50,313 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:42:50,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:42:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 157. [2021-06-05 14:42:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1794871794871793) internal successors, (340), 156 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 340 transitions. [2021-06-05 14:42:50,315 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 340 transitions. Word has length 19 [2021-06-05 14:42:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:50,315 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 340 transitions. [2021-06-05 14:42:50,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 340 transitions. [2021-06-05 14:42:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:50,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:50,315 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:50,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18380 [2021-06-05 14:42:50,516 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash -237659338, now seen corresponding path program 345 times [2021-06-05 14:42:50,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:50,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678203842] [2021-06-05 14:42:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:50,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:50,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678203842] [2021-06-05 14:42:50,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678203842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:50,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600551480] [2021-06-05 14:42:50,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:50,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:50,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:50,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:50,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:50,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:50,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:50,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:50,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,858 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:42:50,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:50,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:50,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:42:50,865 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 14:42:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:50,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600551480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:50,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:50,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740585856] [2021-06-05 14:42:50,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:50,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:50,871 INFO L87 Difference]: Start difference. First operand 157 states and 340 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:51,055 INFO L93 Difference]: Finished difference Result 189 states and 397 transitions. [2021-06-05 14:42:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:51,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:51,055 INFO L225 Difference]: With dead ends: 189 [2021-06-05 14:42:51,056 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:42:51,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:42:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 150. [2021-06-05 14:42:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.161073825503356) internal successors, (322), 149 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 322 transitions. [2021-06-05 14:42:51,057 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 322 transitions. Word has length 19 [2021-06-05 14:42:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 322 transitions. [2021-06-05 14:42:51,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 322 transitions. [2021-06-05 14:42:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:51,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:51,057 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:51,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18401 [2021-06-05 14:42:51,258 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash -818282917, now seen corresponding path program 346 times [2021-06-05 14:42:51,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:51,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189331556] [2021-06-05 14:42:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:51,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:51,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189331556] [2021-06-05 14:42:51,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189331556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:51,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123976694] [2021-06-05 14:42:51,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:51,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:51,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123976694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:51,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:51,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:51,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048000190] [2021-06-05 14:42:51,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:51,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:51,588 INFO L87 Difference]: Start difference. First operand 150 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:51,763 INFO L93 Difference]: Finished difference Result 188 states and 398 transitions. [2021-06-05 14:42:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:51,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:51,763 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:42:51,763 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:42:51,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:42:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 152. [2021-06-05 14:42:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1589403973509933) internal successors, (326), 151 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 326 transitions. [2021-06-05 14:42:51,765 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 326 transitions. Word has length 19 [2021-06-05 14:42:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:51,765 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 326 transitions. [2021-06-05 14:42:51,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 326 transitions. [2021-06-05 14:42:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:51,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:51,765 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:51,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18420 [2021-06-05 14:42:51,966 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:51,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2091506633, now seen corresponding path program 347 times [2021-06-05 14:42:51,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:51,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021721250] [2021-06-05 14:42:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:52,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:52,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021721250] [2021-06-05 14:42:52,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021721250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:52,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155916072] [2021-06-05 14:42:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:52,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:42:52,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:52,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155916072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:52,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:52,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255299924] [2021-06-05 14:42:52,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:52,328 INFO L87 Difference]: Start difference. First operand 152 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:52,647 INFO L93 Difference]: Finished difference Result 207 states and 436 transitions. [2021-06-05 14:42:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:52,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:52,647 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:42:52,647 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 14:42:52,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:42:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 14:42:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 153. [2021-06-05 14:42:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1578947368421053) internal successors, (328), 152 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 328 transitions. [2021-06-05 14:42:52,649 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 328 transitions. Word has length 19 [2021-06-05 14:42:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:52,649 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 328 transitions. [2021-06-05 14:42:52,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 328 transitions. [2021-06-05 14:42:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:52,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:52,649 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:52,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18438,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:52,850 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:52,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1076992155, now seen corresponding path program 348 times [2021-06-05 14:42:52,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:52,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465852912] [2021-06-05 14:42:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:52,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:52,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465852912] [2021-06-05 14:42:52,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465852912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:52,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345003765] [2021-06-05 14:42:52,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:53,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:42:53,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:53,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345003765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:53,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:53,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669554795] [2021-06-05 14:42:53,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:53,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:53,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:53,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:53,315 INFO L87 Difference]: Start difference. First operand 153 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:53,709 INFO L93 Difference]: Finished difference Result 219 states and 460 transitions. [2021-06-05 14:42:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:42:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:53,710 INFO L225 Difference]: With dead ends: 219 [2021-06-05 14:42:53,710 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 14:42:53,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:42:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 14:42:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 154. [2021-06-05 14:42:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.156862745098039) internal successors, (330), 153 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 330 transitions. [2021-06-05 14:42:53,712 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 330 transitions. Word has length 19 [2021-06-05 14:42:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:53,712 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 330 transitions. [2021-06-05 14:42:53,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 330 transitions. [2021-06-05 14:42:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:53,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:53,712 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:53,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18469 [2021-06-05 14:42:53,912 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash 629654432, now seen corresponding path program 349 times [2021-06-05 14:42:53,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:53,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664930694] [2021-06-05 14:42:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:53,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:53,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664930694] [2021-06-05 14:42:53,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664930694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:53,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289034712] [2021-06-05 14:42:53,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:54,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:54,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:54,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:54,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:54,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,393 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:42:54,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:54,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:54,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:54,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:54,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:54,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:54,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:54,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:54,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:54,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:54,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:54,562 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:54,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:54,590 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:54,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:54,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:54,614 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:42:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:54,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289034712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:54,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:54,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:54,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740369294] [2021-06-05 14:42:54,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:54,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:54,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:54,644 INFO L87 Difference]: Start difference. First operand 154 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:54,812 INFO L93 Difference]: Finished difference Result 179 states and 381 transitions. [2021-06-05 14:42:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:54,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:54,813 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:42:54,813 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:42:54,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:42:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 14:42:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.16) internal successors, (324), 150 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 324 transitions. [2021-06-05 14:42:54,814 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 324 transitions. Word has length 19 [2021-06-05 14:42:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:54,814 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 324 transitions. [2021-06-05 14:42:54,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 324 transitions. [2021-06-05 14:42:54,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:54,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:54,815 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:55,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18528 [2021-06-05 14:42:55,015 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1163224865, now seen corresponding path program 350 times [2021-06-05 14:42:55,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:55,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025433594] [2021-06-05 14:42:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:55,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:55,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025433594] [2021-06-05 14:42:55,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025433594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:55,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258196078] [2021-06-05 14:42:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258196078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:55,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:55,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:55,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699004476] [2021-06-05 14:42:55,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:55,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:55,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:55,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:55,363 INFO L87 Difference]: Start difference. First operand 151 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:55,586 INFO L93 Difference]: Finished difference Result 189 states and 400 transitions. [2021-06-05 14:42:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:55,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:55,587 INFO L225 Difference]: With dead ends: 189 [2021-06-05 14:42:55,587 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:42:55,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:42:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2021-06-05 14:42:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1578947368421053) internal successors, (328), 152 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 328 transitions. [2021-06-05 14:42:55,588 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 328 transitions. Word has length 19 [2021-06-05 14:42:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:55,588 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 328 transitions. [2021-06-05 14:42:55,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 328 transitions. [2021-06-05 14:42:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:55,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:55,589 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:55,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18551 [2021-06-05 14:42:55,789 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:55,789 INFO L82 PathProgramCache]: Analyzing trace with hash -479018955, now seen corresponding path program 351 times [2021-06-05 14:42:55,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:55,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957872390] [2021-06-05 14:42:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:55,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:55,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957872390] [2021-06-05 14:42:55,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957872390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:55,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587012421] [2021-06-05 14:42:55,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:55,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:42:55,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:56,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587012421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:56,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:56,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:56,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81975736] [2021-06-05 14:42:56,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:56,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:56,187 INFO L87 Difference]: Start difference. First operand 153 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:56,468 INFO L93 Difference]: Finished difference Result 215 states and 453 transitions. [2021-06-05 14:42:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:56,468 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:42:56,468 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:42:56,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:42:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 154. [2021-06-05 14:42:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.156862745098039) internal successors, (330), 153 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 330 transitions. [2021-06-05 14:42:56,470 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 330 transitions. Word has length 19 [2021-06-05 14:42:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:56,470 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 330 transitions. [2021-06-05 14:42:56,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 330 transitions. [2021-06-05 14:42:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:56,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:56,470 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:56,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18581,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:56,671 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1669890230, now seen corresponding path program 352 times [2021-06-05 14:42:56,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:56,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628660926] [2021-06-05 14:42:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:56,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:56,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628660926] [2021-06-05 14:42:56,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628660926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:56,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308751503] [2021-06-05 14:42:56,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:56,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:56,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:57,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:57,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:57,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:57,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:57,073 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 14:42:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:57,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:57,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:57,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:57,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:57,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:57,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:57,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:57,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:57,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:57,158 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:57,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:57,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:57,176 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 14:42:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:57,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308751503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:57,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:57,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:57,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031210747] [2021-06-05 14:42:57,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:57,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:57,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:57,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:57,206 INFO L87 Difference]: Start difference. First operand 154 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:57,404 INFO L93 Difference]: Finished difference Result 177 states and 377 transitions. [2021-06-05 14:42:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:57,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:57,405 INFO L225 Difference]: With dead ends: 177 [2021-06-05 14:42:57,405 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 14:42:57,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 14:42:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 152. [2021-06-05 14:42:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1589403973509933) internal successors, (326), 151 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 326 transitions. [2021-06-05 14:42:57,406 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 326 transitions. Word has length 19 [2021-06-05 14:42:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:57,406 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 326 transitions. [2021-06-05 14:42:57,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,407 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 326 transitions. [2021-06-05 14:42:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:57,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:57,407 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:57,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18624,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:57,607 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1589994021, now seen corresponding path program 353 times [2021-06-05 14:42:57,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:57,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001857033] [2021-06-05 14:42:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:57,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:57,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001857033] [2021-06-05 14:42:57,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001857033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:57,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278319989] [2021-06-05 14:42:57,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:57,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:42:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:57,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278319989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:57,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:57,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:57,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249255342] [2021-06-05 14:42:57,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:57,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:57,997 INFO L87 Difference]: Start difference. First operand 152 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:58,208 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-06-05 14:42:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:58,208 INFO L225 Difference]: With dead ends: 190 [2021-06-05 14:42:58,208 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 14:42:58,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 14:42:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-06-05 14:42:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1633986928104574) internal successors, (331), 153 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 331 transitions. [2021-06-05 14:42:58,210 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 331 transitions. Word has length 19 [2021-06-05 14:42:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:58,210 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 331 transitions. [2021-06-05 14:42:58,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 331 transitions. [2021-06-05 14:42:58,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:58,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:58,210 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:58,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18643,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:58,410 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2037331744, now seen corresponding path program 354 times [2021-06-05 14:42:58,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:58,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320140576] [2021-06-05 14:42:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:58,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320140576] [2021-06-05 14:42:58,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320140576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654870596] [2021-06-05 14:42:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:58,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:42:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:58,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:58,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:58,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:58,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:58,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:58,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:58,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:58,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:58,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:58,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:58,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:58,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:58,816 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,849 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:42:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:58,851 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:58,874 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:42:58,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:58,875 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:42:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654870596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:58,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:58,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871090832] [2021-06-05 14:42:58,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:58,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:58,898 INFO L87 Difference]: Start difference. First operand 154 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:59,175 INFO L93 Difference]: Finished difference Result 229 states and 468 transitions. [2021-06-05 14:42:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:42:59,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:59,176 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:42:59,176 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 14:42:59,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 14:42:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 155. [2021-06-05 14:42:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1818181818181817) internal successors, (336), 154 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 336 transitions. [2021-06-05 14:42:59,181 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 336 transitions. Word has length 19 [2021-06-05 14:42:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:59,182 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 336 transitions. [2021-06-05 14:42:59,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 336 transitions. [2021-06-05 14:42:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:59,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:59,182 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:59,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18680 [2021-06-05 14:42:59,382 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1722405750, now seen corresponding path program 355 times [2021-06-05 14:42:59,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:59,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478769719] [2021-06-05 14:42:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:59,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:59,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478769719] [2021-06-05 14:42:59,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478769719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:59,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410618595] [2021-06-05 14:42:59,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:59,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:42:59,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:59,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:59,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:59,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:59,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:59,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:59,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:59,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:59,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:59,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:59,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:59,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:59,765 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:42:59,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:42:59,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:59,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:59,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:42:59,772 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:42:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:59,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410618595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:59,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:59,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:42:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430741525] [2021-06-05 14:42:59,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:59,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:59,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:59,779 INFO L87 Difference]: Start difference. First operand 155 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:59,966 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-06-05 14:42:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:42:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:59,966 INFO L225 Difference]: With dead ends: 187 [2021-06-05 14:42:59,966 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 14:42:59,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 14:42:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 153. [2021-06-05 14:42:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.164473684210526) internal successors, (329), 152 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 329 transitions. [2021-06-05 14:42:59,968 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 329 transitions. Word has length 19 [2021-06-05 14:42:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:59,968 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 329 transitions. [2021-06-05 14:42:59,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 329 transitions. [2021-06-05 14:42:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:42:59,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:59,968 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:00,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18734,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:00,169 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:00,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:00,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1357685215, now seen corresponding path program 356 times [2021-06-05 14:43:00,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:00,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232763541] [2021-06-05 14:43:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:00,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232763541] [2021-06-05 14:43:00,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232763541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981717569] [2021-06-05 14:43:00,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:00,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:00,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981717569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:00,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667390678] [2021-06-05 14:43:00,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:00,529 INFO L87 Difference]: Start difference. First operand 153 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:00,697 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-06-05 14:43:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:00,697 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:43:00,697 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:43:00,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:43:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 14:43:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1621621621621623) internal successors, (320), 148 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 320 transitions. [2021-06-05 14:43:00,699 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 320 transitions. Word has length 19 [2021-06-05 14:43:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:00,699 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 320 transitions. [2021-06-05 14:43:00,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 320 transitions. [2021-06-05 14:43:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:00,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:00,699 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:00,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18775 [2021-06-05 14:43:00,899 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash -41464289, now seen corresponding path program 357 times [2021-06-05 14:43:00,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:00,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450457913] [2021-06-05 14:43:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:00,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450457913] [2021-06-05 14:43:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450457913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803625500] [2021-06-05 14:43:00,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:01,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:43:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:01,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803625500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:01,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:01,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:01,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721031328] [2021-06-05 14:43:01,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:01,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:01,240 INFO L87 Difference]: Start difference. First operand 149 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:01,411 INFO L93 Difference]: Finished difference Result 188 states and 398 transitions. [2021-06-05 14:43:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:01,411 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:43:01,411 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:43:01,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:43:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 152. [2021-06-05 14:43:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1589403973509933) internal successors, (326), 151 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 326 transitions. [2021-06-05 14:43:01,413 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 326 transitions. Word has length 19 [2021-06-05 14:43:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:01,413 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 326 transitions. [2021-06-05 14:43:01,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 326 transitions. [2021-06-05 14:43:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:01,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:01,413 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:01,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18801,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:01,614 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:01,614 INFO L82 PathProgramCache]: Analyzing trace with hash 642741621, now seen corresponding path program 358 times [2021-06-05 14:43:01,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:01,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274129673] [2021-06-05 14:43:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:01,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274129673] [2021-06-05 14:43:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274129673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606912039] [2021-06-05 14:43:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:01,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:02,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606912039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:02,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:02,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:02,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400063385] [2021-06-05 14:43:02,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:02,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:02,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:02,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:02,018 INFO L87 Difference]: Start difference. First operand 152 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:02,153 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-06-05 14:43:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:02,154 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:43:02,154 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:43:02,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:43:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 153. [2021-06-05 14:43:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1578947368421053) internal successors, (328), 152 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 328 transitions. [2021-06-05 14:43:02,155 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 328 transitions. Word has length 19 [2021-06-05 14:43:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:02,156 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 328 transitions. [2021-06-05 14:43:02,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 328 transitions. [2021-06-05 14:43:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:02,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:02,156 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:02,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18820 [2021-06-05 14:43:02,356 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:02,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1503316490, now seen corresponding path program 359 times [2021-06-05 14:43:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:02,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640772476] [2021-06-05 14:43:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:02,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:02,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640772476] [2021-06-05 14:43:02,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640772476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:02,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592553003] [2021-06-05 14:43:02,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:02,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:43:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:02,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:02,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,763 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-06-05 14:43:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:02,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:02,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:02,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:02,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:02,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:02,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:02,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:02,852 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 14:43:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:02,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592553003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:02,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:02,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:02,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955030388] [2021-06-05 14:43:02,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:02,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:02,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:02,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:02,881 INFO L87 Difference]: Start difference. First operand 153 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:03,044 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2021-06-05 14:43:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:03,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:03,045 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:43:03,045 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:43:03,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:43:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 151. [2021-06-05 14:43:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.16) internal successors, (324), 150 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 324 transitions. [2021-06-05 14:43:03,047 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 324 transitions. Word has length 19 [2021-06-05 14:43:03,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:03,047 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 324 transitions. [2021-06-05 14:43:03,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 324 transitions. [2021-06-05 14:43:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:03,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:03,047 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:03,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18864,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:03,247 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:03,248 INFO L82 PathProgramCache]: Analyzing trace with hash -468233445, now seen corresponding path program 360 times [2021-06-05 14:43:03,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:03,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521273933] [2021-06-05 14:43:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:03,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:03,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521273933] [2021-06-05 14:43:03,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521273933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:03,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018694032] [2021-06-05 14:43:03,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:03,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:03,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:03,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018694032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:03,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:03,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933822216] [2021-06-05 14:43:03,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:03,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:03,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:03,624 INFO L87 Difference]: Start difference. First operand 151 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:03,824 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-06-05 14:43:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:43:03,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:03,824 INFO L225 Difference]: With dead ends: 200 [2021-06-05 14:43:03,825 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 14:43:03,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 14:43:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2021-06-05 14:43:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.164473684210526) internal successors, (329), 152 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 329 transitions. [2021-06-05 14:43:03,826 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 329 transitions. Word has length 19 [2021-06-05 14:43:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:03,826 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 329 transitions. [2021-06-05 14:43:03,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 329 transitions. [2021-06-05 14:43:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:03,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:03,826 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:04,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18884 [2021-06-05 14:43:04,027 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash -915571168, now seen corresponding path program 361 times [2021-06-05 14:43:04,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:04,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55683229] [2021-06-05 14:43:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:04,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:04,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55683229] [2021-06-05 14:43:04,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55683229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:04,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682644387] [2021-06-05 14:43:04,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:04,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:04,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:04,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:04,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:04,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:04,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:04,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:04,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:04,491 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:04,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:04,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:04,496 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,549 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:43:04,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:04,551 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,574 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:04,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:04,575 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682644387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:04,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:04,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:04,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247452323] [2021-06-05 14:43:04,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:04,598 INFO L87 Difference]: Start difference. First operand 153 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:04,939 INFO L93 Difference]: Finished difference Result 233 states and 470 transitions. [2021-06-05 14:43:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:43:04,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:04,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:04,939 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:43:04,939 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 14:43:04,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 14:43:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 154. [2021-06-05 14:43:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.183006535947712) internal successors, (334), 153 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 334 transitions. [2021-06-05 14:43:04,941 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 334 transitions. Word has length 19 [2021-06-05 14:43:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:04,941 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 334 transitions. [2021-06-05 14:43:04,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 334 transitions. [2021-06-05 14:43:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:04,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:04,941 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:05,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18917,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:05,142 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1450800970, now seen corresponding path program 362 times [2021-06-05 14:43:05,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:05,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313851014] [2021-06-05 14:43:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:05,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:05,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313851014] [2021-06-05 14:43:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313851014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:05,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679434360] [2021-06-05 14:43:05,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:05,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:05,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:05,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:05,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:05,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:05,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:05,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:05,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:05,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:05,490 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:05,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:05,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:05,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:05,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:05,498 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 14:43:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:05,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679434360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:05,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:05,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229784367] [2021-06-05 14:43:05,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:05,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:05,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:05,504 INFO L87 Difference]: Start difference. First operand 154 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:05,712 INFO L93 Difference]: Finished difference Result 184 states and 389 transitions. [2021-06-05 14:43:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:05,713 INFO L225 Difference]: With dead ends: 184 [2021-06-05 14:43:05,713 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 14:43:05,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 14:43:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 152. [2021-06-05 14:43:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.165562913907285) internal successors, (327), 151 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 327 transitions. [2021-06-05 14:43:05,715 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 327 transitions. Word has length 19 [2021-06-05 14:43:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:05,715 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 327 transitions. [2021-06-05 14:43:05,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 327 transitions. [2021-06-05 14:43:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:05,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:05,715 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:05,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19008 [2021-06-05 14:43:05,915 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1815521505, now seen corresponding path program 363 times [2021-06-05 14:43:05,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:05,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557433918] [2021-06-05 14:43:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:05,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:05,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557433918] [2021-06-05 14:43:05,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557433918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:05,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563155354] [2021-06-05 14:43:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:06,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:06,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:06,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563155354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:06,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:06,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:06,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813679858] [2021-06-05 14:43:06,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:06,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:06,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:06,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:06,297 INFO L87 Difference]: Start difference. First operand 152 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:06,473 INFO L93 Difference]: Finished difference Result 168 states and 355 transitions. [2021-06-05 14:43:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:06,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:06,474 INFO L225 Difference]: With dead ends: 168 [2021-06-05 14:43:06,474 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 14:43:06,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 14:43:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2021-06-05 14:43:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.161073825503356) internal successors, (322), 149 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 322 transitions. [2021-06-05 14:43:06,475 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 322 transitions. Word has length 19 [2021-06-05 14:43:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:06,475 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 322 transitions. [2021-06-05 14:43:06,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 322 transitions. [2021-06-05 14:43:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:06,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:06,476 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:06,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19028 [2021-06-05 14:43:06,676 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:06,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2024244555, now seen corresponding path program 364 times [2021-06-05 14:43:06,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:06,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110498426] [2021-06-05 14:43:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:06,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110498426] [2021-06-05 14:43:06,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110498426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65536716] [2021-06-05 14:43:06,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:06,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:06,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:07,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65536716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:07,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:07,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:07,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517207883] [2021-06-05 14:43:07,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:07,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:07,053 INFO L87 Difference]: Start difference. First operand 150 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:07,315 INFO L93 Difference]: Finished difference Result 196 states and 408 transitions. [2021-06-05 14:43:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:07,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:07,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:07,315 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:43:07,315 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:43:07,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:43:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:43:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2021-06-05 14:43:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1710526315789473) internal successors, (330), 152 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 330 transitions. [2021-06-05 14:43:07,317 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 330 transitions. Word has length 19 [2021-06-05 14:43:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:07,317 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 330 transitions. [2021-06-05 14:43:07,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 330 transitions. [2021-06-05 14:43:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:07,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:07,317 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:07,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19055,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:07,518 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:07,518 INFO L82 PathProgramCache]: Analyzing trace with hash 124664630, now seen corresponding path program 365 times [2021-06-05 14:43:07,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:07,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228364041] [2021-06-05 14:43:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:07,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:07,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228364041] [2021-06-05 14:43:07,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228364041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:07,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593966211] [2021-06-05 14:43:07,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:07,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:43:07,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:07,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:07,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:07,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:07,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:07,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:07,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:07,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:07,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:07,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:07,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:07,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:07,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:07,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:07,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,960 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 14:43:07,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:07,962 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:07,986 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:07,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:07,986 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:08,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593966211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:08,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:08,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:08,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120953273] [2021-06-05 14:43:08,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:08,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:08,010 INFO L87 Difference]: Start difference. First operand 153 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:08,543 INFO L93 Difference]: Finished difference Result 245 states and 493 transitions. [2021-06-05 14:43:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:43:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:08,544 INFO L225 Difference]: With dead ends: 245 [2021-06-05 14:43:08,544 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 14:43:08,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:43:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 14:43:08,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2021-06-05 14:43:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-06-05 14:43:08,545 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-06-05 14:43:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:08,545 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-06-05 14:43:08,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-06-05 14:43:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:08,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:08,546 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:08,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19089 [2021-06-05 14:43:08,746 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash -410565172, now seen corresponding path program 366 times [2021-06-05 14:43:08,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:08,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972505299] [2021-06-05 14:43:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:08,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:08,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972505299] [2021-06-05 14:43:08,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972505299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:08,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592920409] [2021-06-05 14:43:08,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:08,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:08,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:09,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:09,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:09,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:09,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:09,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,136 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:09,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:09,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:09,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,143 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:09,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592920409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:09,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:09,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:09,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462943583] [2021-06-05 14:43:09,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:09,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:09,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:09,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:09,150 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:09,470 INFO L93 Difference]: Finished difference Result 188 states and 398 transitions. [2021-06-05 14:43:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:09,471 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:43:09,471 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:43:09,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:43:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2021-06-05 14:43:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-06-05 14:43:09,481 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-06-05 14:43:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:09,481 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-06-05 14:43:09,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-06-05 14:43:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:09,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:09,481 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:09,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19139 [2021-06-05 14:43:09,689 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash -775285707, now seen corresponding path program 367 times [2021-06-05 14:43:09,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:09,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96171294] [2021-06-05 14:43:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:09,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:09,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96171294] [2021-06-05 14:43:09,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96171294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:09,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691583345] [2021-06-05 14:43:09,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:09,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691583345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:10,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:10,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955230980] [2021-06-05 14:43:10,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:10,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:10,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:10,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:10,032 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:10,295 INFO L93 Difference]: Finished difference Result 177 states and 377 transitions. [2021-06-05 14:43:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:10,295 INFO L225 Difference]: With dead ends: 177 [2021-06-05 14:43:10,295 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 14:43:10,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:43:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 14:43:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2021-06-05 14:43:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.183006535947712) internal successors, (334), 153 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 334 transitions. [2021-06-05 14:43:10,297 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 334 transitions. Word has length 19 [2021-06-05 14:43:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:10,297 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 334 transitions. [2021-06-05 14:43:10,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 334 transitions. [2021-06-05 14:43:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:10,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:10,297 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:10,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19175 [2021-06-05 14:43:10,497 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash 177180150, now seen corresponding path program 368 times [2021-06-05 14:43:10,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:10,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654126940] [2021-06-05 14:43:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:10,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654126940] [2021-06-05 14:43:10,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654126940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116394591] [2021-06-05 14:43:10,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:10,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:10,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:10,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:10,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:10,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:10,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:10,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:10,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:10,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,875 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:10,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:10,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:10,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,882 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116394591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:10,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:10,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194089164] [2021-06-05 14:43:10,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:10,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:10,889 INFO L87 Difference]: Start difference. First operand 154 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:11,109 INFO L93 Difference]: Finished difference Result 181 states and 381 transitions. [2021-06-05 14:43:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:11,109 INFO L225 Difference]: With dead ends: 181 [2021-06-05 14:43:11,109 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:43:11,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:43:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2021-06-05 14:43:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1621621621621623) internal successors, (320), 148 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 320 transitions. [2021-06-05 14:43:11,111 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 320 transitions. Word has length 19 [2021-06-05 14:43:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:11,111 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 320 transitions. [2021-06-05 14:43:11,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 320 transitions. [2021-06-05 14:43:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:11,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:11,111 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:11,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19193,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:11,325 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1540426277, now seen corresponding path program 369 times [2021-06-05 14:43:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618618318] [2021-06-05 14:43:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:11,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:11,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618618318] [2021-06-05 14:43:11,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618618318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:11,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490558997] [2021-06-05 14:43:11,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:11,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:11,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:11,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:11,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490558997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:11,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:11,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:11,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494599134] [2021-06-05 14:43:11,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:11,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:11,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:11,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:11,730 INFO L87 Difference]: Start difference. First operand 149 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:12,012 INFO L93 Difference]: Finished difference Result 195 states and 398 transitions. [2021-06-05 14:43:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:43:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:12,013 INFO L225 Difference]: With dead ends: 195 [2021-06-05 14:43:12,013 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:43:12,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:43:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:43:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 149. [2021-06-05 14:43:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1621621621621623) internal successors, (320), 148 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 320 transitions. [2021-06-05 14:43:12,014 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 320 transitions. Word has length 19 [2021-06-05 14:43:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:12,014 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 320 transitions. [2021-06-05 14:43:12,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 320 transitions. [2021-06-05 14:43:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:12,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:12,015 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:12,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19229,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:12,215 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1771973494, now seen corresponding path program 370 times [2021-06-05 14:43:12,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:12,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515530314] [2021-06-05 14:43:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:12,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:12,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515530314] [2021-06-05 14:43:12,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515530314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:12,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353266116] [2021-06-05 14:43:12,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:12,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:12,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:12,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:12,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:12,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:12,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:12,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:12,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:12,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:12,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:12,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:12,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:12,619 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:12,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:12,622 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:12,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:12,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:12,626 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:12,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353266116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:12,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:12,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:12,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414215694] [2021-06-05 14:43:12,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:12,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:12,633 INFO L87 Difference]: Start difference. First operand 149 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:13,011 INFO L93 Difference]: Finished difference Result 191 states and 401 transitions. [2021-06-05 14:43:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:13,012 INFO L225 Difference]: With dead ends: 191 [2021-06-05 14:43:13,012 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 14:43:13,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 14:43:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2021-06-05 14:43:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 14:43:13,013 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 19 [2021-06-05 14:43:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:13,013 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 14:43:13,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 14:43:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:13,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:13,014 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:13,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19265 [2021-06-05 14:43:13,214 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:13,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1407252959, now seen corresponding path program 371 times [2021-06-05 14:43:13,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:13,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298474167] [2021-06-05 14:43:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:13,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:13,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298474167] [2021-06-05 14:43:13,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298474167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:13,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185050850] [2021-06-05 14:43:13,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:13,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:13,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185050850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:13,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:13,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:13,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470816909] [2021-06-05 14:43:13,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:13,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:13,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:13,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:13,616 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:13,944 INFO L93 Difference]: Finished difference Result 186 states and 389 transitions. [2021-06-05 14:43:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:13,945 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:43:13,945 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 14:43:13,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:43:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 14:43:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2021-06-05 14:43:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.165562913907285) internal successors, (327), 151 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 327 transitions. [2021-06-05 14:43:13,946 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 327 transitions. Word has length 19 [2021-06-05 14:43:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:13,946 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 327 transitions. [2021-06-05 14:43:13,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 327 transitions. [2021-06-05 14:43:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:13,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:13,947 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:14,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19304 [2021-06-05 14:43:14,147 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1935248480, now seen corresponding path program 372 times [2021-06-05 14:43:14,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:14,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312464907] [2021-06-05 14:43:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:14,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:14,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312464907] [2021-06-05 14:43:14,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312464907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:14,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934027177] [2021-06-05 14:43:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:14,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:14,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:14,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:14,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:14,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:14,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:14,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:14,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:14,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:14,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,525 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:14,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:14,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:14,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,532 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 14:43:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:14,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934027177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:14,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:14,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:14,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755702709] [2021-06-05 14:43:14,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:14,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:14,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:14,540 INFO L87 Difference]: Start difference. First operand 152 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:14,754 INFO L93 Difference]: Finished difference Result 181 states and 381 transitions. [2021-06-05 14:43:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:14,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:14,754 INFO L225 Difference]: With dead ends: 181 [2021-06-05 14:43:14,754 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:43:14,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:43:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:43:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 152. [2021-06-05 14:43:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.165562913907285) internal successors, (327), 151 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 327 transitions. [2021-06-05 14:43:14,756 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 327 transitions. Word has length 19 [2021-06-05 14:43:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 327 transitions. [2021-06-05 14:43:14,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 327 transitions. [2021-06-05 14:43:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:14,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:14,756 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:14,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19331 [2021-06-05 14:43:14,957 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash -895012682, now seen corresponding path program 373 times [2021-06-05 14:43:14,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:14,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741735774] [2021-06-05 14:43:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:15,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:15,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741735774] [2021-06-05 14:43:15,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741735774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:15,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423119357] [2021-06-05 14:43:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:15,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:15,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:15,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,315 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:43:15,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:15,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:15,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,322 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:43:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:15,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423119357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:15,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:15,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:15,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058801065] [2021-06-05 14:43:15,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:15,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:15,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:15,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:15,329 INFO L87 Difference]: Start difference. First operand 152 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:15,506 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-06-05 14:43:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:15,507 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:43:15,507 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:43:15,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:43:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 150. [2021-06-05 14:43:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1543624161073827) internal successors, (321), 149 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 321 transitions. [2021-06-05 14:43:15,508 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 321 transitions. Word has length 19 [2021-06-05 14:43:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:15,508 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 321 transitions. [2021-06-05 14:43:15,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 321 transitions. [2021-06-05 14:43:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:15,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:15,509 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:15,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19351 [2021-06-05 14:43:15,709 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -934136993, now seen corresponding path program 374 times [2021-06-05 14:43:15,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:15,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263608743] [2021-06-05 14:43:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:15,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:15,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263608743] [2021-06-05 14:43:15,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263608743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:15,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942693386] [2021-06-05 14:43:15,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:15,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:15,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:15,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942693386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:16,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:16,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207155212] [2021-06-05 14:43:16,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:16,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:16,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:16,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:16,097 INFO L87 Difference]: Start difference. First operand 150 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:16,266 INFO L93 Difference]: Finished difference Result 168 states and 351 transitions. [2021-06-05 14:43:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:16,267 INFO L225 Difference]: With dead ends: 168 [2021-06-05 14:43:16,267 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 14:43:16,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 14:43:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-06-05 14:43:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 14:43:16,268 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 14:43:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:16,268 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 14:43:16,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 14:43:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:16,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:16,269 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:16,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19373,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,469 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash -835352655, now seen corresponding path program 375 times [2021-06-05 14:43:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:16,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800816705] [2021-06-05 14:43:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:16,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800816705] [2021-06-05 14:43:16,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800816705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793395226] [2021-06-05 14:43:16,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:16,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:16,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:16,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:16,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:16,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:16,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:16,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:16,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,868 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:16,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:16,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:16,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,875 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793395226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:16,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:16,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945905273] [2021-06-05 14:43:16,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:16,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:16,881 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:17,094 INFO L93 Difference]: Finished difference Result 166 states and 352 transitions. [2021-06-05 14:43:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:17,094 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:43:17,094 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:43:17,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:43:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 150. [2021-06-05 14:43:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 14:43:17,096 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 14:43:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:17,096 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 14:43:17,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 14:43:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:17,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:17,096 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:17,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19400 [2021-06-05 14:43:17,297 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash -826189821, now seen corresponding path program 376 times [2021-06-05 14:43:17,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:17,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53464520] [2021-06-05 14:43:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:17,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:17,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53464520] [2021-06-05 14:43:17,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53464520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:17,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075523837] [2021-06-05 14:43:17,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:17,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:17,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:17,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:17,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:17,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,666 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:43:17,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:17,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:17,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,673 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:43:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:17,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075523837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:17,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:17,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:17,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704466612] [2021-06-05 14:43:17,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:17,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:17,679 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:17,941 INFO L93 Difference]: Finished difference Result 188 states and 396 transitions. [2021-06-05 14:43:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:17,942 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:43:17,942 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:43:17,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 303.5ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:43:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:43:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2021-06-05 14:43:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-06-05 14:43:17,943 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 19 [2021-06-05 14:43:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:17,943 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-06-05 14:43:17,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-06-05 14:43:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:17,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:17,944 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:18,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19441 [2021-06-05 14:43:18,144 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2083599729, now seen corresponding path program 377 times [2021-06-05 14:43:18,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:18,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297385345] [2021-06-05 14:43:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:18,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:18,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297385345] [2021-06-05 14:43:18,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297385345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:18,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865379987] [2021-06-05 14:43:18,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:18,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:43:18,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:18,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:18,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:18,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:18,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:18,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:18,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:18,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:18,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,541 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:18,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:18,543 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:18,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,548 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:18,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865379987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:18,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594075566] [2021-06-05 14:43:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:18,553 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:18,949 INFO L93 Difference]: Finished difference Result 197 states and 414 transitions. [2021-06-05 14:43:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:18,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:18,950 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:43:18,950 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:43:18,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:43:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2021-06-05 14:43:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 324 transitions. [2021-06-05 14:43:18,951 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 324 transitions. Word has length 19 [2021-06-05 14:43:18,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:18,952 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 324 transitions. [2021-06-05 14:43:18,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 324 transitions. [2021-06-05 14:43:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:18,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:18,952 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:19,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19466 [2021-06-05 14:43:19,165 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:19,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:19,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1069085251, now seen corresponding path program 378 times [2021-06-05 14:43:19,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:19,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500631388] [2021-06-05 14:43:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:19,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500631388] [2021-06-05 14:43:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500631388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837220232] [2021-06-05 14:43:19,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:19,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:19,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:19,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:19,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:19,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:19,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:19,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:19,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:19,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:19,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:19,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:19,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:19,584 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:19,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:19,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:19,589 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:19,592 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,625 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:43:19,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:19,627 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,651 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:19,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:19,651 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:19,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837220232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:19,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:19,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:19,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583813235] [2021-06-05 14:43:19,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:19,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:19,676 INFO L87 Difference]: Start difference. First operand 152 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:20,073 INFO L93 Difference]: Finished difference Result 201 states and 422 transitions. [2021-06-05 14:43:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:20,073 INFO L225 Difference]: With dead ends: 201 [2021-06-05 14:43:20,073 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 14:43:20,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 14:43:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2021-06-05 14:43:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1447368421052633) internal successors, (326), 152 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 326 transitions. [2021-06-05 14:43:20,075 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 326 transitions. Word has length 19 [2021-06-05 14:43:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:20,075 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 326 transitions. [2021-06-05 14:43:20,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 326 transitions. [2021-06-05 14:43:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:20,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:20,075 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19502 [2021-06-05 14:43:20,281 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash 621747528, now seen corresponding path program 379 times [2021-06-05 14:43:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:20,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078979464] [2021-06-05 14:43:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:20,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078979464] [2021-06-05 14:43:20,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078979464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596910879] [2021-06-05 14:43:20,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:20,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:20,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596910879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:20,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:20,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134823021] [2021-06-05 14:43:20,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:20,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:20,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:20,726 INFO L87 Difference]: Start difference. First operand 153 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:20,886 INFO L93 Difference]: Finished difference Result 169 states and 360 transitions. [2021-06-05 14:43:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:20,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:20,887 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:43:20,887 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 14:43:20,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 14:43:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2021-06-05 14:43:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 14:43:20,889 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 14:43:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:20,889 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 14:43:20,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 14:43:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:20,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:20,889 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:21,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19555 [2021-06-05 14:43:21,089 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:21,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1356348845, now seen corresponding path program 380 times [2021-06-05 14:43:21,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:21,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555077306] [2021-06-05 14:43:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:21,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555077306] [2021-06-05 14:43:21,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555077306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000268505] [2021-06-05 14:43:21,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:21,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:21,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:21,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:21,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:21,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,449 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:43:21,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:21,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:21,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,456 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:43:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:21,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000268505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:21,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:21,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:21,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471425374] [2021-06-05 14:43:21,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:21,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:21,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:21,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:21,461 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:21,664 INFO L93 Difference]: Finished difference Result 176 states and 372 transitions. [2021-06-05 14:43:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:21,665 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:43:21,665 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:43:21,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:43:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 149. [2021-06-05 14:43:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 14:43:21,667 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 14:43:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:21,667 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 14:43:21,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 14:43:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:21,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:21,667 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:21,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19612 [2021-06-05 14:43:21,867 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -28828901, now seen corresponding path program 381 times [2021-06-05 14:43:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:21,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368494542] [2021-06-05 14:43:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:21,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368494542] [2021-06-05 14:43:21,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368494542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919844536] [2021-06-05 14:43:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:22,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:22,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:22,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:22,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:22,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:22,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:22,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:22,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:22,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:22,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,260 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:22,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:22,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:22,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,267 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:22,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919844536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:22,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:22,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:22,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106250686] [2021-06-05 14:43:22,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:22,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:22,272 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:22,619 INFO L93 Difference]: Finished difference Result 192 states and 404 transitions. [2021-06-05 14:43:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:22,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:22,619 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:43:22,619 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 14:43:22,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 14:43:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2021-06-05 14:43:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 14:43:22,621 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 14:43:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:22,621 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 14:43:22,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 14:43:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:22,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:22,621 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19637,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:22,821 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash 655377009, now seen corresponding path program 382 times [2021-06-05 14:43:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:22,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841993179] [2021-06-05 14:43:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:22,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841993179] [2021-06-05 14:43:22,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841993179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091724300] [2021-06-05 14:43:22,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:23,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:23,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:23,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:23,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:23,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:23,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:23,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:23,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:23,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:23,298 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:23,300 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:23,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,334 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 14:43:23,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:23,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,360 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:23,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:23,361 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:23,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091724300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:23,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:23,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:23,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132564676] [2021-06-05 14:43:23,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:23,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:23,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:23,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:23,385 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:23,744 INFO L93 Difference]: Finished difference Result 202 states and 425 transitions. [2021-06-05 14:43:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:23,745 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:43:23,745 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:43:23,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:43:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2021-06-05 14:43:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-06-05 14:43:23,746 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 19 [2021-06-05 14:43:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:23,746 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-06-05 14:43:23,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-06-05 14:43:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:23,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:23,746 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:23,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19674 [2021-06-05 14:43:23,947 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1490681102, now seen corresponding path program 383 times [2021-06-05 14:43:23,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:23,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518701135] [2021-06-05 14:43:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:24,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518701135] [2021-06-05 14:43:24,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518701135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942227277] [2021-06-05 14:43:24,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:24,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:24,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:24,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:24,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:24,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942227277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:24,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:24,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:24,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232847403] [2021-06-05 14:43:24,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:24,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:24,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:24,358 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:24,550 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2021-06-05 14:43:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:24,551 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:43:24,551 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:43:24,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:43:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-06-05 14:43:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 14:43:24,552 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 14:43:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:24,552 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 14:43:24,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 14:43:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:24,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:24,553 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:24,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19761,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:24,753 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406897, now seen corresponding path program 384 times [2021-06-05 14:43:24,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:24,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007475739] [2021-06-05 14:43:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:24,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:24,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007475739] [2021-06-05 14:43:24,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007475739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:24,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5264215] [2021-06-05 14:43:24,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:24,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:24,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:24,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:25,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:25,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:25,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:25,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,158 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:25,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:25,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,165 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:25,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5264215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:25,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:25,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489262272] [2021-06-05 14:43:25,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:25,171 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:25,385 INFO L93 Difference]: Finished difference Result 178 states and 376 transitions. [2021-06-05 14:43:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:25,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:25,386 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:43:25,386 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 14:43:25,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 14:43:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2021-06-05 14:43:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-06-05 14:43:25,387 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-06-05 14:43:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:25,387 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-06-05 14:43:25,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-06-05 14:43:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:25,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:25,387 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:25,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19808,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:25,588 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:25,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1695612807, now seen corresponding path program 385 times [2021-06-05 14:43:25,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:25,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774972439] [2021-06-05 14:43:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:25,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:25,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774972439] [2021-06-05 14:43:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774972439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:25,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329394984] [2021-06-05 14:43:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:26,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:26,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:26,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:26,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:26,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:26,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:26,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:26,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:26,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:26,064 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:26,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,099 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:43:26,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:26,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,125 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:26,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:26,125 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:26,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329394984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:26,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:26,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842838344] [2021-06-05 14:43:26,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:26,148 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:26,376 INFO L93 Difference]: Finished difference Result 194 states and 409 transitions. [2021-06-05 14:43:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:26,376 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:43:26,376 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:43:26,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:43:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:43:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 151. [2021-06-05 14:43:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-06-05 14:43:26,378 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 19 [2021-06-05 14:43:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:26,378 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-06-05 14:43:26,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-06-05 14:43:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:26,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:26,378 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:26,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19850 [2021-06-05 14:43:26,579 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash -450445304, now seen corresponding path program 386 times [2021-06-05 14:43:26,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:26,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753405223] [2021-06-05 14:43:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:26,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753405223] [2021-06-05 14:43:26,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753405223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926431710] [2021-06-05 14:43:26,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:26,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:26,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:26,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:26,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926431710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:26,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:26,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:26,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826036291] [2021-06-05 14:43:26,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:26,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:26,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:26,970 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:27,126 INFO L93 Difference]: Finished difference Result 165 states and 351 transitions. [2021-06-05 14:43:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:27,127 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:43:27,127 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:43:27,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:43:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 14:43:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 14:43:27,128 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 14:43:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:27,128 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 14:43:27,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 14:43:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:27,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:27,129 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:27,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19935,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:27,329 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2011609167, now seen corresponding path program 387 times [2021-06-05 14:43:27,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:27,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816976063] [2021-06-05 14:43:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:27,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:27,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816976063] [2021-06-05 14:43:27,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816976063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:27,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499027620] [2021-06-05 14:43:27,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:27,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:27,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:27,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:27,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:27,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:27,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,782 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 14:43:27,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:27,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:27,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:27,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:27,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:27,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:27,946 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:27,973 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:27,997 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:43:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:28,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499027620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:28,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:28,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:28,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336194919] [2021-06-05 14:43:28,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:28,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:28,026 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:28,194 INFO L93 Difference]: Finished difference Result 184 states and 382 transitions. [2021-06-05 14:43:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:28,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:28,195 INFO L225 Difference]: With dead ends: 184 [2021-06-05 14:43:28,195 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 14:43:28,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 14:43:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2021-06-05 14:43:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1533333333333333) internal successors, (323), 150 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 323 transitions. [2021-06-05 14:43:28,196 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 323 transitions. Word has length 19 [2021-06-05 14:43:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:28,196 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 323 transitions. [2021-06-05 14:43:28,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 323 transitions. [2021-06-05 14:43:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:28,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:28,197 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:28,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19982 [2021-06-05 14:43:28,397 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 137300018, now seen corresponding path program 388 times [2021-06-05 14:43:28,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:28,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543375161] [2021-06-05 14:43:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:28,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:28,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543375161] [2021-06-05 14:43:28,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543375161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:28,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823023374] [2021-06-05 14:43:28,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:28,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:28,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:28,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:28,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:28,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823023374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:28,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:28,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:28,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815368943] [2021-06-05 14:43:28,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:28,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:28,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:28,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:28,768 INFO L87 Difference]: Start difference. First operand 151 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:28,940 INFO L93 Difference]: Finished difference Result 223 states and 459 transitions. [2021-06-05 14:43:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:28,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:28,941 INFO L225 Difference]: With dead ends: 223 [2021-06-05 14:43:28,941 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 14:43:28,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 14:43:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2021-06-05 14:43:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.172185430463576) internal successors, (328), 151 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 328 transitions. [2021-06-05 14:43:28,942 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 328 transitions. Word has length 19 [2021-06-05 14:43:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:28,942 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 328 transitions. [2021-06-05 14:43:28,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 328 transitions. [2021-06-05 14:43:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:28,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:28,943 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:29,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20004 [2021-06-05 14:43:29,143 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:29,143 INFO L82 PathProgramCache]: Analyzing trace with hash -397929784, now seen corresponding path program 389 times [2021-06-05 14:43:29,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:29,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392060770] [2021-06-05 14:43:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:29,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:29,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392060770] [2021-06-05 14:43:29,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392060770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:29,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845760602] [2021-06-05 14:43:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:29,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:43:29,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:29,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:29,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:29,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845760602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:29,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:29,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730803207] [2021-06-05 14:43:29,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:29,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:29,474 INFO L87 Difference]: Start difference. First operand 152 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:29,639 INFO L93 Difference]: Finished difference Result 183 states and 389 transitions. [2021-06-05 14:43:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:29,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:29,639 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:43:29,639 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:43:29,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:43:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2021-06-05 14:43:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1543624161073827) internal successors, (321), 149 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 321 transitions. [2021-06-05 14:43:29,641 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 321 transitions. Word has length 19 [2021-06-05 14:43:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:29,641 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 321 transitions. [2021-06-05 14:43:29,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 321 transitions. [2021-06-05 14:43:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:29,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:29,641 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:29,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20033 [2021-06-05 14:43:29,842 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:29,842 INFO L82 PathProgramCache]: Analyzing trace with hash -762650319, now seen corresponding path program 390 times [2021-06-05 14:43:29,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:29,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639928272] [2021-06-05 14:43:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:29,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639928272] [2021-06-05 14:43:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639928272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585923432] [2021-06-05 14:43:29,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:30,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:43:30,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:30,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585923432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:30,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:30,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:30,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62522615] [2021-06-05 14:43:30,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:30,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:30,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:30,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:30,296 INFO L87 Difference]: Start difference. First operand 150 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:30,521 INFO L93 Difference]: Finished difference Result 162 states and 341 transitions. [2021-06-05 14:43:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:30,521 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:43:30,521 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 14:43:30,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 14:43:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2021-06-05 14:43:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 14:43:30,523 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 14:43:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:30,523 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 14:43:30,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 14:43:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:30,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:30,523 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:30,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20049 [2021-06-05 14:43:30,723 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash 295570755, now seen corresponding path program 391 times [2021-06-05 14:43:30,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:30,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162044881] [2021-06-05 14:43:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:30,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:30,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162044881] [2021-06-05 14:43:30,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162044881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:30,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627783133] [2021-06-05 14:43:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:31,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:31,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:31,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:31,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:31,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:31,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:31,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,107 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:31,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:31,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:31,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,114 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:31,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627783133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:31,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:31,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731966657] [2021-06-05 14:43:31,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:31,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:31,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:31,120 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:31,320 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 14:43:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:31,321 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:43:31,321 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:43:31,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:43:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2021-06-05 14:43:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 14:43:31,322 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 14:43:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:31,322 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 14:43:31,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 14:43:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:31,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:31,322 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:31,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20075,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:31,523 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:31,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1089606991, now seen corresponding path program 392 times [2021-06-05 14:43:31,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:31,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592939969] [2021-06-05 14:43:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:31,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:31,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592939969] [2021-06-05 14:43:31,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592939969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:31,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123939052] [2021-06-05 14:43:31,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:31,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:31,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:31,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:31,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:31,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:31,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:31,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:31,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:31,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:31,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,880 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:43:31,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:31,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:31,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,887 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:43:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:31,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123939052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:31,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:31,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:31,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157402808] [2021-06-05 14:43:31,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:31,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:31,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:31,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:31,897 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:32,184 INFO L93 Difference]: Finished difference Result 194 states and 408 transitions. [2021-06-05 14:43:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:32,185 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:43:32,185 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:43:32,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:43:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:43:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2021-06-05 14:43:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 14:43:32,186 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 14:43:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:32,186 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 14:43:32,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 14:43:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:32,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:32,186 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:32,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20105,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:32,387 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2104121469, now seen corresponding path program 393 times [2021-06-05 14:43:32,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:32,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087952022] [2021-06-05 14:43:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:32,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087952022] [2021-06-05 14:43:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087952022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925065761] [2021-06-05 14:43:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:32,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:32,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:32,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:32,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:32,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:32,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:32,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:32,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:32,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:32,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:32,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,876 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:43:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:32,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,902 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:32,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:32,902 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:32,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925065761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:32,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:32,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:32,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220653385] [2021-06-05 14:43:32,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:32,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:32,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:32,926 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:33,284 INFO L93 Difference]: Finished difference Result 202 states and 424 transitions. [2021-06-05 14:43:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:33,284 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:43:33,284 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:43:33,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:43:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 14:43:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-06-05 14:43:33,286 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 19 [2021-06-05 14:43:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:33,286 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-06-05 14:43:33,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-06-05 14:43:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:33,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:33,286 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:33,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20128,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:33,487 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:33,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:33,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1743508104, now seen corresponding path program 394 times [2021-06-05 14:43:33,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:33,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62147125] [2021-06-05 14:43:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:33,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:33,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62147125] [2021-06-05 14:43:33,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62147125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:33,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486731910] [2021-06-05 14:43:33,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:33,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:33,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:33,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486731910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:33,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:33,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511945042] [2021-06-05 14:43:33,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:33,860 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:34,034 INFO L93 Difference]: Finished difference Result 167 states and 355 transitions. [2021-06-05 14:43:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:34,035 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:43:34,035 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:43:34,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:43:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 146. [2021-06-05 14:43:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 14:43:34,036 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 14:43:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:34,036 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 14:43:34,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 14:43:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:34,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:34,037 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:34,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20209,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:34,237 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash -49371193, now seen corresponding path program 395 times [2021-06-05 14:43:34,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:34,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488097185] [2021-06-05 14:43:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:34,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:34,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488097185] [2021-06-05 14:43:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488097185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:34,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340151241] [2021-06-05 14:43:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:34,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:34,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:34,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:34,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:34,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:34,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:34,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:34,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:34,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:34,595 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:43:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:34,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:34,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:34,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:34,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-06-05 14:43:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:34,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340151241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:34,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:34,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97793059] [2021-06-05 14:43:34,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:34,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:34,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:34,612 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:34,800 INFO L93 Difference]: Finished difference Result 177 states and 374 transitions. [2021-06-05 14:43:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:34,800 INFO L225 Difference]: With dead ends: 177 [2021-06-05 14:43:34,800 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 14:43:34,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 14:43:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2021-06-05 14:43:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 14:43:34,802 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 14:43:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:34,802 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 14:43:34,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 14:43:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:34,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:34,802 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:35,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20244,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:35,003 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:35,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1063885671, now seen corresponding path program 396 times [2021-06-05 14:43:35,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:35,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522200654] [2021-06-05 14:43:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:35,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522200654] [2021-06-05 14:43:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522200654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291901039] [2021-06-05 14:43:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:35,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:35,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:35,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:35,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:35,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:35,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:35,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:35,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:35,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:35,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:35,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:35,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,411 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:43:35,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:35,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,437 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:35,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:35,437 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:43:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291901039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:35,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:35,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:35,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93209337] [2021-06-05 14:43:35,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:35,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:35,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:35,461 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:35,709 INFO L93 Difference]: Finished difference Result 195 states and 410 transitions. [2021-06-05 14:43:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:35,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:35,709 INFO L225 Difference]: With dead ends: 195 [2021-06-05 14:43:35,709 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:43:35,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:43:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:43:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 148. [2021-06-05 14:43:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 14:43:35,711 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 14:43:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:35,711 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 14:43:35,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 14:43:35,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:35,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:35,711 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:35,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20265 [2021-06-05 14:43:35,912 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:35,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1511223394, now seen corresponding path program 397 times [2021-06-05 14:43:35,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:35,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952793191] [2021-06-05 14:43:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:35,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:35,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952793191] [2021-06-05 14:43:35,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952793191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:35,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472332531] [2021-06-05 14:43:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:36,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472332531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:36,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:36,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:36,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381112937] [2021-06-05 14:43:36,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:36,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:36,309 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:36,504 INFO L93 Difference]: Finished difference Result 162 states and 345 transitions. [2021-06-05 14:43:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:36,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:36,504 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:43:36,505 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 14:43:36,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 14:43:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 146. [2021-06-05 14:43:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 14:43:36,506 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 14:43:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:36,506 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 14:43:36,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 14:43:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:36,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:36,506 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:36,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20307,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:36,707 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:36,707 INFO L82 PathProgramCache]: Analyzing trace with hash -476140349, now seen corresponding path program 398 times [2021-06-05 14:43:36,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:36,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680164700] [2021-06-05 14:43:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:36,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:36,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680164700] [2021-06-05 14:43:36,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680164700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:36,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253953703] [2021-06-05 14:43:36,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:36,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:36,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:36,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:37,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:37,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:37,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,157 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 14:43:37,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:37,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:37,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:37,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:37,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:37,287 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:37,316 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:37,343 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:37,367 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:43:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:37,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253953703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:37,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:37,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765917601] [2021-06-05 14:43:37,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:37,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:37,407 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:37,563 INFO L93 Difference]: Finished difference Result 176 states and 363 transitions. [2021-06-05 14:43:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:37,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:37,564 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:43:37,564 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:43:37,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:43:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 146. [2021-06-05 14:43:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 14:43:37,565 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 14:43:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:37,565 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 14:43:37,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 14:43:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:37,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:37,566 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:37,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20345 [2021-06-05 14:43:37,766 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash 775242316, now seen corresponding path program 399 times [2021-06-05 14:43:37,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:37,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533557386] [2021-06-05 14:43:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:37,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:37,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533557386] [2021-06-05 14:43:37,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533557386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:37,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274071784] [2021-06-05 14:43:37,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:37,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:43:37,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:37,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:38,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274071784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:38,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:38,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:38,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523792184] [2021-06-05 14:43:38,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:38,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:38,195 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:38,373 INFO L93 Difference]: Finished difference Result 219 states and 451 transitions. [2021-06-05 14:43:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:38,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:38,374 INFO L225 Difference]: With dead ends: 219 [2021-06-05 14:43:38,374 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 14:43:38,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 14:43:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2021-06-05 14:43:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 14:43:38,375 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 19 [2021-06-05 14:43:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:38,375 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 14:43:38,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 14:43:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:38,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:38,376 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:38,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20368 [2021-06-05 14:43:38,576 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:38,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1458707874, now seen corresponding path program 400 times [2021-06-05 14:43:38,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:38,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056052086] [2021-06-05 14:43:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:38,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:38,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056052086] [2021-06-05 14:43:38,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056052086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:38,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828144851] [2021-06-05 14:43:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:38,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:38,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:38,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:38,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:38,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828144851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:38,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:38,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542685086] [2021-06-05 14:43:38,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:38,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:38,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:38,905 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:39,069 INFO L93 Difference]: Finished difference Result 178 states and 378 transitions. [2021-06-05 14:43:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:39,069 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:43:39,069 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 14:43:39,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 14:43:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2021-06-05 14:43:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1527777777777777) internal successors, (310), 144 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 310 transitions. [2021-06-05 14:43:39,071 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 310 transitions. Word has length 19 [2021-06-05 14:43:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:39,071 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 310 transitions. [2021-06-05 14:43:39,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 310 transitions. [2021-06-05 14:43:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:39,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:39,071 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:39,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20417,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:39,271 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1823428409, now seen corresponding path program 401 times [2021-06-05 14:43:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:39,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187371324] [2021-06-05 14:43:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:39,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:39,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187371324] [2021-06-05 14:43:39,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187371324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:39,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074210754] [2021-06-05 14:43:39,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:39,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:43:39,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:39,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074210754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:39,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:39,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891716659] [2021-06-05 14:43:39,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:39,636 INFO L87 Difference]: Start difference. First operand 145 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:39,787 INFO L93 Difference]: Finished difference Result 157 states and 330 transitions. [2021-06-05 14:43:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:39,787 INFO L225 Difference]: With dead ends: 157 [2021-06-05 14:43:39,788 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 14:43:39,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 14:43:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 142. [2021-06-05 14:43:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-06-05 14:43:39,789 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 19 [2021-06-05 14:43:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:39,789 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-06-05 14:43:39,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-06-05 14:43:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:39,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:39,789 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:39,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20434 [2021-06-05 14:43:39,990 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2133167473, now seen corresponding path program 402 times [2021-06-05 14:43:39,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:39,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599981359] [2021-06-05 14:43:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:40,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:40,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599981359] [2021-06-05 14:43:40,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599981359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:40,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017800518] [2021-06-05 14:43:40,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:40,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:40,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:40,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:40,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:40,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:40,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:40,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:40,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:40,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,357 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:43:40,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:40,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:40,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,364 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:43:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017800518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:40,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:40,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:40,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768118558] [2021-06-05 14:43:40,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:40,369 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:40,558 INFO L93 Difference]: Finished difference Result 185 states and 389 transitions. [2021-06-05 14:43:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:40,559 INFO L225 Difference]: With dead ends: 185 [2021-06-05 14:43:40,559 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 14:43:40,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 14:43:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2021-06-05 14:43:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 144 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 309 transitions. [2021-06-05 14:43:40,560 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 309 transitions. Word has length 19 [2021-06-05 14:43:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:40,560 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 309 transitions. [2021-06-05 14:43:40,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 309 transitions. [2021-06-05 14:43:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:40,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:40,561 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:40,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20453,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:40,761 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1118652995, now seen corresponding path program 403 times [2021-06-05 14:43:40,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:40,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344186067] [2021-06-05 14:43:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:40,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:40,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344186067] [2021-06-05 14:43:40,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344186067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:40,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409006290] [2021-06-05 14:43:40,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:40,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:41,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:41,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:41,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:41,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:41,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:41,201 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:41,203 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:41,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:41,206 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:41,209 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,241 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 14:43:41,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:41,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,266 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:41,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:41,267 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:41,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409006290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:41,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:41,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:41,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803936027] [2021-06-05 14:43:41,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:41,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:41,290 INFO L87 Difference]: Start difference. First operand 145 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:41,512 INFO L93 Difference]: Finished difference Result 207 states and 433 transitions. [2021-06-05 14:43:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:41,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:41,512 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:43:41,513 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 14:43:41,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 14:43:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-06-05 14:43:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 14:43:41,514 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 14:43:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:41,514 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 14:43:41,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 14:43:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:41,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:41,514 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:41,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20478 [2021-06-05 14:43:41,715 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:41,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:41,715 INFO L82 PathProgramCache]: Analyzing trace with hash -889848591, now seen corresponding path program 404 times [2021-06-05 14:43:41,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:41,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743599152] [2021-06-05 14:43:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:41,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743599152] [2021-06-05 14:43:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743599152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170451916] [2021-06-05 14:43:41,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:41,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:41,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:41,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:41,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:42,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:42,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:42,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,163 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:43:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:42,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:42,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:42,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:42,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:42,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:42,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:42,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:42,300 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:42,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:42,329 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:42,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:42,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:42,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:42,379 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:43:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:42,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170451916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:42,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:42,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:42,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275592803] [2021-06-05 14:43:42,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:42,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:42,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:42,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:42,408 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:42,605 INFO L93 Difference]: Finished difference Result 178 states and 369 transitions. [2021-06-05 14:43:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:42,605 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:43:42,605 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 14:43:42,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 14:43:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 148. [2021-06-05 14:43:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 14:43:42,607 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 14:43:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:42,607 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 14:43:42,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 14:43:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:42,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:42,607 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:42,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20559,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:42,808 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1259060594, now seen corresponding path program 405 times [2021-06-05 14:43:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:42,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432335096] [2021-06-05 14:43:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:42,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432335096] [2021-06-05 14:43:42,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432335096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401070120] [2021-06-05 14:43:42,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:42,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:43,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401070120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:43,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:43,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:43,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127462944] [2021-06-05 14:43:43,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:43,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:43,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:43,233 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:43,511 INFO L93 Difference]: Finished difference Result 222 states and 457 transitions. [2021-06-05 14:43:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:43:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:43,512 INFO L225 Difference]: With dead ends: 222 [2021-06-05 14:43:43,512 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:43:43,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:43:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:43:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 149. [2021-06-05 14:43:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 14:43:43,513 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 19 [2021-06-05 14:43:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:43,513 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 14:43:43,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 14:43:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:43,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:43,514 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:43,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20580,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:43,714 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash 723830792, now seen corresponding path program 406 times [2021-06-05 14:43:43,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:43,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957261714] [2021-06-05 14:43:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:43,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:43,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957261714] [2021-06-05 14:43:43,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957261714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927830433] [2021-06-05 14:43:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:43,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:43,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:44,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927830433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:44,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:44,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:44,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242679281] [2021-06-05 14:43:44,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:44,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:44,062 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:44,295 INFO L93 Difference]: Finished difference Result 179 states and 380 transitions. [2021-06-05 14:43:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:44,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:44,295 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:43:44,295 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:43:44,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:43:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 147. [2021-06-05 14:43:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 14:43:44,297 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 14:43:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:44,297 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 14:43:44,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 14:43:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:44,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:44,297 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:44,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20632 [2021-06-05 14:43:44,497 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 359110257, now seen corresponding path program 407 times [2021-06-05 14:43:44,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:44,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613324118] [2021-06-05 14:43:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:44,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:44,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613324118] [2021-06-05 14:43:44,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613324118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:44,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254055640] [2021-06-05 14:43:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:44,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:43:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:44,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254055640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:44,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:44,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:44,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082475133] [2021-06-05 14:43:44,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:44,858 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:45,096 INFO L93 Difference]: Finished difference Result 158 states and 332 transitions. [2021-06-05 14:43:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:45,097 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:43:45,097 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 14:43:45,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 14:43:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-06-05 14:43:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 14:43:45,098 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 14:43:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:45,098 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 14:43:45,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 14:43:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:45,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:45,099 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:45,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20653,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:45,299 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash 150387207, now seen corresponding path program 408 times [2021-06-05 14:43:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:45,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139651760] [2021-06-05 14:43:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:45,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:45,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139651760] [2021-06-05 14:43:45,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139651760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:45,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342424547] [2021-06-05 14:43:45,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:45,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:45,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:45,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:45,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:45,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,787 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:43:45,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:45,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:45,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:45,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:45,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:45,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:45,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:45,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:45,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:45,955 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:45,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:45,982 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:46,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:46,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:46,006 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:43:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:46,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342424547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:46,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:46,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:46,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360738132] [2021-06-05 14:43:46,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:46,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:46,037 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:46,223 INFO L93 Difference]: Finished difference Result 183 states and 380 transitions. [2021-06-05 14:43:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:46,224 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:43:46,224 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:43:46,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:43:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2021-06-05 14:43:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1554054054054053) internal successors, (319), 148 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 319 transitions. [2021-06-05 14:43:46,225 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 319 transitions. Word has length 19 [2021-06-05 14:43:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:46,225 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 319 transitions. [2021-06-05 14:43:46,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 319 transitions. [2021-06-05 14:43:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:46,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:46,226 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:46,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20671 [2021-06-05 14:43:46,426 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:46,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1995670904, now seen corresponding path program 409 times [2021-06-05 14:43:46,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:46,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033344143] [2021-06-05 14:43:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:46,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:46,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033344143] [2021-06-05 14:43:46,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033344143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:46,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525434639] [2021-06-05 14:43:46,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:46,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525434639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:46,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:46,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:46,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426840673] [2021-06-05 14:43:46,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:46,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:46,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:46,811 INFO L87 Difference]: Start difference. First operand 149 states and 319 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:47,198 INFO L93 Difference]: Finished difference Result 232 states and 476 transitions. [2021-06-05 14:43:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:43:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:47,199 INFO L225 Difference]: With dead ends: 232 [2021-06-05 14:43:47,199 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 14:43:47,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:43:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 14:43:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 151. [2021-06-05 14:43:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.18) internal successors, (327), 150 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 327 transitions. [2021-06-05 14:43:47,201 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 327 transitions. Word has length 19 [2021-06-05 14:43:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:47,201 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 327 transitions. [2021-06-05 14:43:47,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 327 transitions. [2021-06-05 14:43:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:47,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:47,201 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:47,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20693 [2021-06-05 14:43:47,401 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1764066590, now seen corresponding path program 410 times [2021-06-05 14:43:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:47,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873857962] [2021-06-05 14:43:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:47,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:47,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873857962] [2021-06-05 14:43:47,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873857962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:47,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324504019] [2021-06-05 14:43:47,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:47,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:47,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:47,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:47,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:47,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324504019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:47,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:47,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:47,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994494325] [2021-06-05 14:43:47,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:47,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:47,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:47,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:47,741 INFO L87 Difference]: Start difference. First operand 151 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:48,099 INFO L93 Difference]: Finished difference Result 192 states and 405 transitions. [2021-06-05 14:43:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:48,100 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:43:48,100 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 14:43:48,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:43:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 14:43:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-06-05 14:43:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.18) internal successors, (327), 150 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 327 transitions. [2021-06-05 14:43:48,101 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 327 transitions. Word has length 19 [2021-06-05 14:43:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:48,102 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 327 transitions. [2021-06-05 14:43:48,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 327 transitions. [2021-06-05 14:43:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:48,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:48,102 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:48,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20724,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:48,302 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1399346055, now seen corresponding path program 411 times [2021-06-05 14:43:48,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:48,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300391737] [2021-06-05 14:43:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:48,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:48,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300391737] [2021-06-05 14:43:48,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300391737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:48,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066304213] [2021-06-05 14:43:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:48,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:48,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:48,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:48,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:48,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066304213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:48,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:48,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:48,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156005624] [2021-06-05 14:43:48,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:48,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:48,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:48,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:48,705 INFO L87 Difference]: Start difference. First operand 151 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:48,958 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-06-05 14:43:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:48,958 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:43:48,958 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 14:43:48,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 14:43:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2021-06-05 14:43:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.174496644295302) internal successors, (324), 149 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 324 transitions. [2021-06-05 14:43:48,960 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 324 transitions. Word has length 19 [2021-06-05 14:43:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:48,960 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 324 transitions. [2021-06-05 14:43:48,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 324 transitions. [2021-06-05 14:43:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:48,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:48,960 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:49,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20741 [2021-06-05 14:43:49,161 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1943155384, now seen corresponding path program 412 times [2021-06-05 14:43:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:49,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186243411] [2021-06-05 14:43:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:49,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:49,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186243411] [2021-06-05 14:43:49,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186243411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:49,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122789206] [2021-06-05 14:43:49,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:49,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:49,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122789206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:49,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:49,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:49,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228719676] [2021-06-05 14:43:49,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:49,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:49,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:49,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:49,521 INFO L87 Difference]: Start difference. First operand 150 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:49,734 INFO L93 Difference]: Finished difference Result 182 states and 383 transitions. [2021-06-05 14:43:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:49,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:49,734 INFO L225 Difference]: With dead ends: 182 [2021-06-05 14:43:49,734 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 14:43:49,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 14:43:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 147. [2021-06-05 14:43:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 14:43:49,736 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 14:43:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:49,736 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 14:43:49,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 14:43:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:49,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:49,736 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:49,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20760,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:49,936 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash 386653523, now seen corresponding path program 413 times [2021-06-05 14:43:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:49,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533375459] [2021-06-05 14:43:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:50,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:50,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533375459] [2021-06-05 14:43:50,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533375459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:50,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92777264] [2021-06-05 14:43:50,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:50,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:43:50,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:50,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92777264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:50,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:50,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730180270] [2021-06-05 14:43:50,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:50,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:50,357 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:50,614 INFO L93 Difference]: Finished difference Result 160 states and 335 transitions. [2021-06-05 14:43:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:50,615 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:43:50,615 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 14:43:50,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 14:43:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-06-05 14:43:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 14:43:50,616 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 14:43:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:50,616 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 14:43:50,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 14:43:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:50,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:50,616 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:50,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20790 [2021-06-05 14:43:50,817 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1771188333, now seen corresponding path program 414 times [2021-06-05 14:43:50,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:50,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337670009] [2021-06-05 14:43:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:50,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:50,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337670009] [2021-06-05 14:43:50,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337670009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:50,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790460095] [2021-06-05 14:43:50,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:51,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:51,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:43:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:51,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:51,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:51,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:51,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:51,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:51,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:51,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:51,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:51,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:51,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:51,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:51,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:51,225 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:51,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:51,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:51,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:51,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:51,232 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790460095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:51,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:51,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:51,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722586666] [2021-06-05 14:43:51,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:51,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:51,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:51,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:51,237 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:51,457 INFO L93 Difference]: Finished difference Result 188 states and 395 transitions. [2021-06-05 14:43:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:51,457 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:43:51,457 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:43:51,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:43:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 146. [2021-06-05 14:43:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 14:43:51,459 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 14:43:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:51,459 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 14:43:51,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 14:43:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:51,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:51,459 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:51,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20812,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:51,660 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash 386010587, now seen corresponding path program 415 times [2021-06-05 14:43:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:51,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110699880] [2021-06-05 14:43:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:51,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:51,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110699880] [2021-06-05 14:43:51,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110699880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:51,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110480153] [2021-06-05 14:43:51,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:52,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:52,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:52,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:52,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:52,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:52,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:52,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:52,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:52,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:52,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:52,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:52,065 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:43:52,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:52,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:52,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:52,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:52,072 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:43:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:52,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110480153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:52,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:52,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:52,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644150755] [2021-06-05 14:43:52,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:52,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:52,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:52,077 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:52,402 INFO L93 Difference]: Finished difference Result 196 states and 411 transitions. [2021-06-05 14:43:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:52,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:52,403 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:43:52,403 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:43:52,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:43:52,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:43:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 147. [2021-06-05 14:43:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.143835616438356) internal successors, (313), 146 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 313 transitions. [2021-06-05 14:43:52,405 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 313 transitions. Word has length 19 [2021-06-05 14:43:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:52,405 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 313 transitions. [2021-06-05 14:43:52,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 313 transitions. [2021-06-05 14:43:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:52,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:52,405 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:52,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20853 [2021-06-05 14:43:52,605 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash -628503891, now seen corresponding path program 416 times [2021-06-05 14:43:52,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:52,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235584164] [2021-06-05 14:43:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:52,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:52,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235584164] [2021-06-05 14:43:52,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235584164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:52,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388452441] [2021-06-05 14:43:52,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:52,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:53,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:53,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:53,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:53,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:53,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:53,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:53,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:53,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:53,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:53,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:53,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:53,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:53,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,117 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 14:43:53,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:53,120 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,143 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:53,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:53,144 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:43:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:53,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388452441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:53,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:53,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:53,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453246684] [2021-06-05 14:43:53,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:53,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:53,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:53,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:53,168 INFO L87 Difference]: Start difference. First operand 147 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:53,561 INFO L93 Difference]: Finished difference Result 211 states and 441 transitions. [2021-06-05 14:43:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:43:53,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:53,561 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:43:53,561 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:43:53,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:43:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:43:53,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 148. [2021-06-05 14:43:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.142857142857143) internal successors, (315), 147 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 315 transitions. [2021-06-05 14:43:53,563 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 315 transitions. Word has length 19 [2021-06-05 14:43:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:53,563 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 315 transitions. [2021-06-05 14:43:53,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 315 transitions. [2021-06-05 14:43:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:53,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:53,563 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:53,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20895 [2021-06-05 14:43:53,777 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1075841614, now seen corresponding path program 417 times [2021-06-05 14:43:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:53,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227517458] [2021-06-05 14:43:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:53,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227517458] [2021-06-05 14:43:53,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227517458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724462776] [2021-06-05 14:43:53,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:53,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:43:53,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:53,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:53,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:54,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724462776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:54,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:54,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:54,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249613922] [2021-06-05 14:43:54,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:54,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:54,170 INFO L87 Difference]: Start difference. First operand 148 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:54,373 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-06-05 14:43:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:54,374 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:43:54,374 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:43:54,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:43:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2021-06-05 14:43:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 144 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:54,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 309 transitions. [2021-06-05 14:43:54,375 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 309 transitions. Word has length 19 [2021-06-05 14:43:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:54,376 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 309 transitions. [2021-06-05 14:43:54,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 309 transitions. [2021-06-05 14:43:54,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:54,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:54,376 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:54,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20981,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:54,576 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1426246385, now seen corresponding path program 418 times [2021-06-05 14:43:54,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:54,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765385053] [2021-06-05 14:43:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:54,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765385053] [2021-06-05 14:43:54,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765385053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56415730] [2021-06-05 14:43:54,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:54,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:54,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:54,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:54,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:54,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:54,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:54,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:54,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:54,941 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:43:54,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:54,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:54,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:54,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:43:54,948 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:43:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:54,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56415730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:54,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:54,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748446890] [2021-06-05 14:43:54,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:54,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:54,953 INFO L87 Difference]: Start difference. First operand 145 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:55,142 INFO L93 Difference]: Finished difference Result 188 states and 395 transitions. [2021-06-05 14:43:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:55,143 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:43:55,143 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:43:55,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:43:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2021-06-05 14:43:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.143835616438356) internal successors, (313), 146 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 313 transitions. [2021-06-05 14:43:55,145 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 313 transitions. Word has length 19 [2021-06-05 14:43:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:55,145 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 313 transitions. [2021-06-05 14:43:55,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 313 transitions. [2021-06-05 14:43:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:55,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:55,145 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:55,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21018 [2021-06-05 14:43:55,345 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:55,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2110452295, now seen corresponding path program 419 times [2021-06-05 14:43:55,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:55,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850885803] [2021-06-05 14:43:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:55,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:55,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850885803] [2021-06-05 14:43:55,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850885803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:55,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253487887] [2021-06-05 14:43:55,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:55,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:43:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:55,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:55,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:55,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:55,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:55,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:55,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:55,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,755 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:43:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:55,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,780 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:43:55,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:55,781 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:43:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253487887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:55,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:55,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:55,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245972229] [2021-06-05 14:43:55,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:55,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:55,803 INFO L87 Difference]: Start difference. First operand 147 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:56,107 INFO L93 Difference]: Finished difference Result 205 states and 430 transitions. [2021-06-05 14:43:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:43:56,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:56,108 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:43:56,108 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:43:56,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:43:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:43:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 148. [2021-06-05 14:43:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.142857142857143) internal successors, (315), 147 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 315 transitions. [2021-06-05 14:43:56,109 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 315 transitions. Word has length 19 [2021-06-05 14:43:56,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:56,109 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 315 transitions. [2021-06-05 14:43:56,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 315 transitions. [2021-06-05 14:43:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:56,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:56,110 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:56,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21044 [2021-06-05 14:43:56,317 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash -35605816, now seen corresponding path program 420 times [2021-06-05 14:43:56,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:56,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78913225] [2021-06-05 14:43:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:56,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:56,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78913225] [2021-06-05 14:43:56,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78913225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:56,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166800981] [2021-06-05 14:43:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:56,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:56,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:56,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:56,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166800981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:56,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:56,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:56,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759907074] [2021-06-05 14:43:56,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:56,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:56,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:56,715 INFO L87 Difference]: Start difference. First operand 148 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:56,933 INFO L93 Difference]: Finished difference Result 167 states and 354 transitions. [2021-06-05 14:43:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:56,933 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:43:56,933 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:43:56,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:43:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 146. [2021-06-05 14:43:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 14:43:56,935 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 14:43:56,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:56,935 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 14:43:56,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 14:43:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:56,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:56,935 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:57,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21087 [2021-06-05 14:43:57,136 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 999477229, now seen corresponding path program 421 times [2021-06-05 14:43:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:57,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446785908] [2021-06-05 14:43:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:57,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:57,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446785908] [2021-06-05 14:43:57,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446785908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:57,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286607839] [2021-06-05 14:43:57,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:57,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:57,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,600 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:43:57,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:57,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:57,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:57,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:57,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:57,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:57,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:57,699 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:57,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:43:57,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:57,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:57,757 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:57,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:43:57,784 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:57,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:57,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:57,808 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:43:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:57,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286607839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:57,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:57,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:57,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357585463] [2021-06-05 14:43:57,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:57,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:57,838 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:58,035 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2021-06-05 14:43:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:58,036 INFO L225 Difference]: With dead ends: 185 [2021-06-05 14:43:58,036 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 14:43:58,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 14:43:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 148. [2021-06-05 14:43:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1496598639455784) internal successors, (316), 147 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 316 transitions. [2021-06-05 14:43:58,037 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 316 transitions. Word has length 19 [2021-06-05 14:43:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:58,037 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 316 transitions. [2021-06-05 14:43:58,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 316 transitions. [2021-06-05 14:43:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:58,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:58,038 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:58,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21124,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:58,238 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash 552139506, now seen corresponding path program 422 times [2021-06-05 14:43:58,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:58,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783019502] [2021-06-05 14:43:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:58,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:58,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783019502] [2021-06-05 14:43:58,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783019502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:58,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376585173] [2021-06-05 14:43:58,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:58,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:58,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376585173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:58,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:58,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:58,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848530586] [2021-06-05 14:43:58,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:58,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:58,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:58,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:58,660 INFO L87 Difference]: Start difference. First operand 148 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:58,873 INFO L93 Difference]: Finished difference Result 228 states and 471 transitions. [2021-06-05 14:43:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:43:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:58,874 INFO L225 Difference]: With dead ends: 228 [2021-06-05 14:43:58,874 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 14:43:58,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 14:43:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 149. [2021-06-05 14:43:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.168918918918919) internal successors, (321), 148 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 321 transitions. [2021-06-05 14:43:58,875 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 321 transitions. Word has length 19 [2021-06-05 14:43:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:58,875 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 321 transitions. [2021-06-05 14:43:58,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 321 transitions. [2021-06-05 14:43:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:58,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:58,876 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:59,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21144 [2021-06-05 14:43:59,081 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash 16909704, now seen corresponding path program 423 times [2021-06-05 14:43:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:59,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977656595] [2021-06-05 14:43:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:59,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977656595] [2021-06-05 14:43:59,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977656595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557051071] [2021-06-05 14:43:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:59,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:43:59,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:59,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557051071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:59,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:59,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:43:59,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834376757] [2021-06-05 14:43:59,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:59,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:59,409 INFO L87 Difference]: Start difference. First operand 149 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:59,590 INFO L93 Difference]: Finished difference Result 188 states and 399 transitions. [2021-06-05 14:43:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:43:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:59,591 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:43:59,591 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:43:59,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:43:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2021-06-05 14:43:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-06-05 14:43:59,592 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 19 [2021-06-05 14:43:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:59,592 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-06-05 14:43:59,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-06-05 14:43:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:43:59,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:59,593 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:59,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21197,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:59,793 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash -347810831, now seen corresponding path program 424 times [2021-06-05 14:43:59,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:59,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674555257] [2021-06-05 14:43:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:59,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:59,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674555257] [2021-06-05 14:43:59,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674555257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:59,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535359603] [2021-06-05 14:43:59,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:59,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:59,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:59,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:43:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:00,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535359603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:00,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:00,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:00,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920202304] [2021-06-05 14:44:00,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:00,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:00,179 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:00,440 INFO L93 Difference]: Finished difference Result 161 states and 338 transitions. [2021-06-05 14:44:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:00,440 INFO L225 Difference]: With dead ends: 161 [2021-06-05 14:44:00,440 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 14:44:00,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 14:44:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-06-05 14:44:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 143 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 307 transitions. [2021-06-05 14:44:00,442 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 307 transitions. Word has length 19 [2021-06-05 14:44:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:00,442 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 307 transitions. [2021-06-05 14:44:00,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 307 transitions. [2021-06-05 14:44:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:00,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:00,442 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:00,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21213 [2021-06-05 14:44:00,642 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash -686182245, now seen corresponding path program 425 times [2021-06-05 14:44:00,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:00,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066616898] [2021-06-05 14:44:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:00,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066616898] [2021-06-05 14:44:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066616898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95197369] [2021-06-05 14:44:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:00,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:00,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:00,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:00,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:00,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:00,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:00,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:00,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:00,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:00,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,007 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:44:01,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:01,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:01,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,014 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:44:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95197369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:01,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:01,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305331425] [2021-06-05 14:44:01,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:01,019 INFO L87 Difference]: Start difference. First operand 144 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:01,188 INFO L93 Difference]: Finished difference Result 176 states and 371 transitions. [2021-06-05 14:44:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:01,189 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:44:01,189 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:44:01,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:44:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 145. [2021-06-05 14:44:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1458333333333335) internal successors, (309), 144 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 309 transitions. [2021-06-05 14:44:01,190 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 309 transitions. Word has length 19 [2021-06-05 14:44:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:01,190 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 309 transitions. [2021-06-05 14:44:01,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 309 transitions. [2021-06-05 14:44:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:01,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:01,191 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:01,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21233,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:01,391 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1976335, now seen corresponding path program 426 times [2021-06-05 14:44:01,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:01,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848726138] [2021-06-05 14:44:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:01,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:01,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848726138] [2021-06-05 14:44:01,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848726138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352976787] [2021-06-05 14:44:01,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:01,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:44:01,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:01,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:01,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:01,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:01,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:01,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:01,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:01,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:01,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:01,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:01,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:01,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:01,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:01,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:01,837 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:01,839 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,871 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-06-05 14:44:01,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:01,873 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:01,897 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:44:01,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:01,897 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:44:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:01,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352976787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:01,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:01,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:01,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244455058] [2021-06-05 14:44:01,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:01,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:01,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:01,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:01,919 INFO L87 Difference]: Start difference. First operand 145 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:02,061 INFO L93 Difference]: Finished difference Result 198 states and 416 transitions. [2021-06-05 14:44:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:02,061 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:44:02,061 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:44:02,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:44:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 146. [2021-06-05 14:44:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1448275862068966) internal successors, (311), 145 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 311 transitions. [2021-06-05 14:44:02,063 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 311 transitions. Word has length 19 [2021-06-05 14:44:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:02,063 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 311 transitions. [2021-06-05 14:44:02,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 311 transitions. [2021-06-05 14:44:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:02,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:02,063 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:02,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21258 [2021-06-05 14:44:02,280 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2146932850, now seen corresponding path program 427 times [2021-06-05 14:44:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:02,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194522526] [2021-06-05 14:44:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:02,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194522526] [2021-06-05 14:44:02,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194522526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89694074] [2021-06-05 14:44:02,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:02,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:02,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:02,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89694074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:02,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:02,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:02,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720521859] [2021-06-05 14:44:02,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:02,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:02,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:02,688 INFO L87 Difference]: Start difference. First operand 146 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:02,809 INFO L93 Difference]: Finished difference Result 159 states and 337 transitions. [2021-06-05 14:44:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:02,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:02,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:02,810 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:44:02,810 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 14:44:02,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 14:44:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 144. [2021-06-05 14:44:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 143 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 307 transitions. [2021-06-05 14:44:02,812 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 307 transitions. Word has length 19 [2021-06-05 14:44:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:02,812 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 307 transitions. [2021-06-05 14:44:02,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 307 transitions. [2021-06-05 14:44:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:02,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:02,812 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:03,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21328,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:03,012 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash 585768987, now seen corresponding path program 428 times [2021-06-05 14:44:03,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:03,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626837256] [2021-06-05 14:44:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:03,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:03,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626837256] [2021-06-05 14:44:03,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626837256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:03,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854407942] [2021-06-05 14:44:03,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:03,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:03,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:03,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:03,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:03,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:03,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,464 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:44:03,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:03,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:03,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:03,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:03,570 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:03,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:03,627 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:03,654 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:03,678 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:44:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854407942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:03,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:03,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:03,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911584932] [2021-06-05 14:44:03,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:03,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:03,706 INFO L87 Difference]: Start difference. First operand 144 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:03,916 INFO L93 Difference]: Finished difference Result 181 states and 374 transitions. [2021-06-05 14:44:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:03,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:03,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:03,916 INFO L225 Difference]: With dead ends: 181 [2021-06-05 14:44:03,916 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:44:03,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:44:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 146. [2021-06-05 14:44:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-06-05 14:44:03,918 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 19 [2021-06-05 14:44:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:03,918 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-06-05 14:44:03,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-06-05 14:44:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:03,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:03,918 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:04,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21366 [2021-06-05 14:44:04,118 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1560289124, now seen corresponding path program 429 times [2021-06-05 14:44:04,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:04,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625855862] [2021-06-05 14:44:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:04,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625855862] [2021-06-05 14:44:04,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625855862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624776916] [2021-06-05 14:44:04,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:04,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:44:04,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:04,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624776916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:04,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:04,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:04,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987623316] [2021-06-05 14:44:04,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:04,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:04,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:04,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:04,549 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:04,794 INFO L93 Difference]: Finished difference Result 213 states and 438 transitions. [2021-06-05 14:44:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:04,795 INFO L225 Difference]: With dead ends: 213 [2021-06-05 14:44:04,795 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:44:04,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:44:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:44:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 147. [2021-06-05 14:44:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.171232876712329) internal successors, (317), 146 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 317 transitions. [2021-06-05 14:44:04,797 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 317 transitions. Word has length 19 [2021-06-05 14:44:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:04,797 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 317 transitions. [2021-06-05 14:44:04,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 317 transitions. [2021-06-05 14:44:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:04,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:04,797 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:04,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21388,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:04,997 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2095518926, now seen corresponding path program 430 times [2021-06-05 14:44:04,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:04,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625114249] [2021-06-05 14:44:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:05,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:05,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625114249] [2021-06-05 14:44:05,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625114249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:05,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721966902] [2021-06-05 14:44:05,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:05,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:05,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:05,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:05,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721966902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:05,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:05,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:05,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28520366] [2021-06-05 14:44:05,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:05,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:05,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:05,328 INFO L87 Difference]: Start difference. First operand 147 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:05,537 INFO L93 Difference]: Finished difference Result 177 states and 376 transitions. [2021-06-05 14:44:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:05,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:05,537 INFO L225 Difference]: With dead ends: 177 [2021-06-05 14:44:05,537 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 14:44:05,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 14:44:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2021-06-05 14:44:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1527777777777777) internal successors, (310), 144 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 310 transitions. [2021-06-05 14:44:05,539 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 310 transitions. Word has length 19 [2021-06-05 14:44:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:05,539 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 310 transitions. [2021-06-05 14:44:05,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 310 transitions. [2021-06-05 14:44:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:05,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:05,539 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:05,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21441 [2021-06-05 14:44:05,739 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1834727835, now seen corresponding path program 431 times [2021-06-05 14:44:05,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:05,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414725892] [2021-06-05 14:44:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:05,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:05,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414725892] [2021-06-05 14:44:05,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414725892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:05,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917104638] [2021-06-05 14:44:05,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:05,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:05,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:05,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:06,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917104638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:06,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:06,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907181208] [2021-06-05 14:44:06,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:06,107 INFO L87 Difference]: Start difference. First operand 145 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:06,324 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2021-06-05 14:44:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:06,324 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:44:06,324 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:44:06,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:44:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2021-06-05 14:44:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.147887323943662) internal successors, (305), 142 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 305 transitions. [2021-06-05 14:44:06,326 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 305 transitions. Word has length 19 [2021-06-05 14:44:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:06,326 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 305 transitions. [2021-06-05 14:44:06,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 305 transitions. [2021-06-05 14:44:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:06,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:06,326 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:06,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-06-05 14:44:06,527 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:06,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1626004785, now seen corresponding path program 432 times [2021-06-05 14:44:06,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:06,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979965939] [2021-06-05 14:44:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:06,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:06,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979965939] [2021-06-05 14:44:06,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979965939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:06,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151372475] [2021-06-05 14:44:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:06,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:06,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:06,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:06,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:06,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,026 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:44:07,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:07,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:07,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:07,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:07,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:07,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:07,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:07,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:07,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:07,155 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:07,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:07,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:07,210 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:07,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:07,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:07,234 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:44:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:07,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151372475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:07,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:07,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:07,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998406541] [2021-06-05 14:44:07,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:07,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:07,268 INFO L87 Difference]: Start difference. First operand 143 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:07,432 INFO L93 Difference]: Finished difference Result 186 states and 386 transitions. [2021-06-05 14:44:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:07,432 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:44:07,432 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 14:44:07,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 14:44:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 146. [2021-06-05 14:44:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1586206896551725) internal successors, (313), 145 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 313 transitions. [2021-06-05 14:44:07,434 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 313 transitions. Word has length 19 [2021-06-05 14:44:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:07,434 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 313 transitions. [2021-06-05 14:44:07,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 313 transitions. [2021-06-05 14:44:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:07,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:07,434 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:07,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-06-05 14:44:07,635 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash -520053326, now seen corresponding path program 433 times [2021-06-05 14:44:07,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:07,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510886979] [2021-06-05 14:44:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:07,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:07,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510886979] [2021-06-05 14:44:07,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510886979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:07,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689897713] [2021-06-05 14:44:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:07,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:08,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689897713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:08,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:08,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:08,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98160136] [2021-06-05 14:44:08,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:08,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:08,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:08,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:08,137 INFO L87 Difference]: Start difference. First operand 146 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:08,554 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-06-05 14:44:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:08,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:08,554 INFO L225 Difference]: With dead ends: 228 [2021-06-05 14:44:08,554 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 14:44:08,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:44:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 14:44:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 148. [2021-06-05 14:44:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.183673469387755) internal successors, (321), 147 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 321 transitions. [2021-06-05 14:44:08,556 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 321 transitions. Word has length 19 [2021-06-05 14:44:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:08,556 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 321 transitions. [2021-06-05 14:44:08,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 321 transitions. [2021-06-05 14:44:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:08,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:08,556 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:08,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21498,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:08,757 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1055283128, now seen corresponding path program 434 times [2021-06-05 14:44:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:08,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737120222] [2021-06-05 14:44:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:08,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:08,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737120222] [2021-06-05 14:44:08,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737120222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:08,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244481751] [2021-06-05 14:44:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:08,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:09,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244481751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:09,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:09,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:09,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918397013] [2021-06-05 14:44:09,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:09,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:09,104 INFO L87 Difference]: Start difference. First operand 148 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:09,414 INFO L93 Difference]: Finished difference Result 189 states and 399 transitions. [2021-06-05 14:44:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:09,415 INFO L225 Difference]: With dead ends: 189 [2021-06-05 14:44:09,415 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:44:09,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:44:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:44:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2021-06-05 14:44:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.183673469387755) internal successors, (321), 147 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 321 transitions. [2021-06-05 14:44:09,416 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 321 transitions. Word has length 19 [2021-06-05 14:44:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:09,417 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 321 transitions. [2021-06-05 14:44:09,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 321 transitions. [2021-06-05 14:44:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:09,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:09,417 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:09,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-06-05 14:44:09,617 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1420003663, now seen corresponding path program 435 times [2021-06-05 14:44:09,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:09,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684515420] [2021-06-05 14:44:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:09,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:09,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684515420] [2021-06-05 14:44:09,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684515420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:09,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842318945] [2021-06-05 14:44:09,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:09,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:44:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:10,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842318945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:10,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:10,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:10,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360471400] [2021-06-05 14:44:10,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:10,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:10,081 INFO L87 Difference]: Start difference. First operand 148 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:10,341 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-06-05 14:44:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:10,342 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:44:10,342 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:44:10,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:44:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2021-06-05 14:44:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1780821917808217) internal successors, (318), 146 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 318 transitions. [2021-06-05 14:44:10,343 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 318 transitions. Word has length 19 [2021-06-05 14:44:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:10,343 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 318 transitions. [2021-06-05 14:44:10,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 318 transitions. [2021-06-05 14:44:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:10,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:10,344 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:10,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21583,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:10,544 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:10,544 INFO L82 PathProgramCache]: Analyzing trace with hash -467537806, now seen corresponding path program 436 times [2021-06-05 14:44:10,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:10,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33780780] [2021-06-05 14:44:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:10,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33780780] [2021-06-05 14:44:10,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33780780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77804153] [2021-06-05 14:44:10,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:10,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:10,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77804153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:10,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:10,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:10,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388044102] [2021-06-05 14:44:10,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:10,907 INFO L87 Difference]: Start difference. First operand 147 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:11,085 INFO L93 Difference]: Finished difference Result 179 states and 377 transitions. [2021-06-05 14:44:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:11,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:11,086 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:44:11,086 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:44:11,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:44:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 144. [2021-06-05 14:44:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1538461538461537) internal successors, (308), 143 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 308 transitions. [2021-06-05 14:44:11,087 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 308 transitions. Word has length 19 [2021-06-05 14:44:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:11,088 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 308 transitions. [2021-06-05 14:44:11,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 308 transitions. [2021-06-05 14:44:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:11,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:11,088 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:11,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21611 [2021-06-05 14:44:11,288 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:11,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:11,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1862271101, now seen corresponding path program 437 times [2021-06-05 14:44:11,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:11,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295870450] [2021-06-05 14:44:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:11,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295870450] [2021-06-05 14:44:11,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295870450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696925038] [2021-06-05 14:44:11,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:11,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:11,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:11,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696925038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:11,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:11,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449813754] [2021-06-05 14:44:11,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:11,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:11,710 INFO L87 Difference]: Start difference. First operand 144 states and 308 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:11,951 INFO L93 Difference]: Finished difference Result 157 states and 329 transitions. [2021-06-05 14:44:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:44:11,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:11,951 INFO L225 Difference]: With dead ends: 157 [2021-06-05 14:44:11,951 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:44:11,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:44:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2021-06-05 14:44:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-06-05 14:44:11,953 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 19 [2021-06-05 14:44:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:11,953 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-06-05 14:44:11,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-06-05 14:44:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:11,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:11,953 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:12,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21640 [2021-06-05 14:44:12,154 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1746960335, now seen corresponding path program 438 times [2021-06-05 14:44:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:12,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546199980] [2021-06-05 14:44:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:12,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:12,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546199980] [2021-06-05 14:44:12,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546199980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:12,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025370584] [2021-06-05 14:44:12,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:12,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:44:12,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:12,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:12,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:12,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:12,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:12,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:12,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:12,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:12,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:12,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:12,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:12,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:12,557 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:44:12,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:12,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:12,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:12,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:44:12,564 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:44:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025370584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:12,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:12,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261812756] [2021-06-05 14:44:12,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:12,570 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:12,752 INFO L93 Difference]: Finished difference Result 173 states and 365 transitions. [2021-06-05 14:44:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:12,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:12,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:12,752 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:44:12,752 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:44:12,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:44:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2021-06-05 14:44:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-06-05 14:44:12,754 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 19 [2021-06-05 14:44:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:12,754 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-06-05 14:44:12,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-06-05 14:44:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:12,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:12,754 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:12,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21662,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:12,954 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:12,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1062754425, now seen corresponding path program 439 times [2021-06-05 14:44:12,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:12,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136266200] [2021-06-05 14:44:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:13,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136266200] [2021-06-05 14:44:13,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136266200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805783792] [2021-06-05 14:44:13,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:13,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:13,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:13,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:13,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:13,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:13,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:13,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:13,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:13,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:13,425 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:13,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:13,428 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,461 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:44:13,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:13,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:13,486 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:44:13,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:13,487 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:44:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:13,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805783792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:13,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:13,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:13,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32992261] [2021-06-05 14:44:13,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:13,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:13,510 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:13,654 INFO L93 Difference]: Finished difference Result 194 states and 408 transitions. [2021-06-05 14:44:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:13,654 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:44:13,654 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:44:13,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:44:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2021-06-05 14:44:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-06-05 14:44:13,656 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 19 [2021-06-05 14:44:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:13,656 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-06-05 14:44:13,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-06-05 14:44:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:13,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:13,656 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:13,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21693,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:13,856 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1086154760, now seen corresponding path program 440 times [2021-06-05 14:44:13,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:13,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551001607] [2021-06-05 14:44:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:13,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:13,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551001607] [2021-06-05 14:44:13,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551001607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:13,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247586339] [2021-06-05 14:44:13,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:14,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:14,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247586339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:14,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:14,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:14,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957937391] [2021-06-05 14:44:14,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:14,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:14,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:14,279 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:14,450 INFO L93 Difference]: Finished difference Result 155 states and 329 transitions. [2021-06-05 14:44:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:14,450 INFO L225 Difference]: With dead ends: 155 [2021-06-05 14:44:14,450 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:44:14,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:44:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2021-06-05 14:44:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.152173913043478) internal successors, (297), 138 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 297 transitions. [2021-06-05 14:44:14,452 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 297 transitions. Word has length 19 [2021-06-05 14:44:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:14,452 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 297 transitions. [2021-06-05 14:44:14,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 297 transitions. [2021-06-05 14:44:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:14,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:14,452 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:14,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21779 [2021-06-05 14:44:14,653 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2121237805, now seen corresponding path program 441 times [2021-06-05 14:44:14,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:14,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239545026] [2021-06-05 14:44:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:14,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:14,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239545026] [2021-06-05 14:44:14,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239545026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:14,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970570162] [2021-06-05 14:44:14,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:14,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:44:14,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:14,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:15,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:15,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:15,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:15,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:15,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:15,082 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-06-05 14:44:15,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:15,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:15,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:15,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:15,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:15,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:15,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:15,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:15,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:15,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:15,146 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:44:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:15,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970570162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:15,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:15,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:15,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421458137] [2021-06-05 14:44:15,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:15,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:15,176 INFO L87 Difference]: Start difference. First operand 139 states and 297 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:15,424 INFO L93 Difference]: Finished difference Result 185 states and 374 transitions. [2021-06-05 14:44:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:15,425 INFO L225 Difference]: With dead ends: 185 [2021-06-05 14:44:15,425 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 14:44:15,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:44:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 14:44:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2021-06-05 14:44:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.157142857142857) internal successors, (302), 140 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 302 transitions. [2021-06-05 14:44:15,426 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 302 transitions. Word has length 19 [2021-06-05 14:44:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:15,427 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 302 transitions. [2021-06-05 14:44:15,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 302 transitions. [2021-06-05 14:44:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:15,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:15,427 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:15,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21816,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:15,627 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1673900082, now seen corresponding path program 442 times [2021-06-05 14:44:15,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:15,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660968998] [2021-06-05 14:44:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:15,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:15,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660968998] [2021-06-05 14:44:15,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660968998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:15,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408347196] [2021-06-05 14:44:15,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:15,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:15,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:15,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:16,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408347196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:16,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:16,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:16,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324595645] [2021-06-05 14:44:16,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:16,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:16,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:16,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:16,060 INFO L87 Difference]: Start difference. First operand 141 states and 302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:16,401 INFO L93 Difference]: Finished difference Result 215 states and 434 transitions. [2021-06-05 14:44:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:16,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:16,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:16,401 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:44:16,401 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:44:16,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:44:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:44:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 142. [2021-06-05 14:44:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 141 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 307 transitions. [2021-06-05 14:44:16,403 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 307 transitions. Word has length 19 [2021-06-05 14:44:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:16,403 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 307 transitions. [2021-06-05 14:44:16,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 307 transitions. [2021-06-05 14:44:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:16,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:16,403 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:16,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21840 [2021-06-05 14:44:16,617 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1138670280, now seen corresponding path program 443 times [2021-06-05 14:44:16,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:16,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316150430] [2021-06-05 14:44:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:16,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316150430] [2021-06-05 14:44:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316150430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595368162] [2021-06-05 14:44:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:16,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:16,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:16,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:16,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:16,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595368162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:16,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:16,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:16,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345303865] [2021-06-05 14:44:16,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:16,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:16,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:16,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:16,953 INFO L87 Difference]: Start difference. First operand 142 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:17,150 INFO L93 Difference]: Finished difference Result 172 states and 365 transitions. [2021-06-05 14:44:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:17,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:17,150 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:44:17,151 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:44:17,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:44:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2021-06-05 14:44:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.158273381294964) internal successors, (300), 139 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 300 transitions. [2021-06-05 14:44:17,152 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 300 transitions. Word has length 19 [2021-06-05 14:44:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:17,152 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 300 transitions. [2021-06-05 14:44:17,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 300 transitions. [2021-06-05 14:44:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:17,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:17,152 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:17,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21892 [2021-06-05 14:44:17,353 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 773949745, now seen corresponding path program 444 times [2021-06-05 14:44:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:17,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280813520] [2021-06-05 14:44:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:17,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:17,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280813520] [2021-06-05 14:44:17,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280813520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:17,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062485682] [2021-06-05 14:44:17,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:17,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:17,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:17,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:17,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062485682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:17,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:17,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:17,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097004963] [2021-06-05 14:44:17,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:17,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:17,764 INFO L87 Difference]: Start difference. First operand 140 states and 300 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:17,939 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 14:44:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:17,940 INFO L225 Difference]: With dead ends: 153 [2021-06-05 14:44:17,940 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:44:17,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:44:17,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2021-06-05 14:44:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 14:44:17,941 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 14:44:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:17,941 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 14:44:17,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 14:44:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:17,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:17,941 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:18,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21908 [2021-06-05 14:44:18,142 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash 565226695, now seen corresponding path program 445 times [2021-06-05 14:44:18,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:18,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573671451] [2021-06-05 14:44:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:18,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:18,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573671451] [2021-06-05 14:44:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573671451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928003011] [2021-06-05 14:44:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:18,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:18,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:18,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:18,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:18,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:18,600 INFO L628 ElimStorePlain]: treesize reduction 51, result has 53.2 percent of original size [2021-06-05 14:44:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:18,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:18,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:18,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:18,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:18,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:18,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:18,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:18,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:18,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:18,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:18,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:18,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:18,689 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-06-05 14:44:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928003011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:18,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:18,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:18,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234046745] [2021-06-05 14:44:18,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:18,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:18,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:18,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:18,719 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:19,028 INFO L93 Difference]: Finished difference Result 181 states and 375 transitions. [2021-06-05 14:44:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:19,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:19,028 INFO L225 Difference]: With dead ends: 181 [2021-06-05 14:44:19,028 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:44:19,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:44:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2021-06-05 14:44:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.164285714285714) internal successors, (303), 140 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 303 transitions. [2021-06-05 14:44:19,030 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 303 transitions. Word has length 19 [2021-06-05 14:44:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:19,030 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 303 transitions. [2021-06-05 14:44:19,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 303 transitions. [2021-06-05 14:44:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:19,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:19,030 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:19,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21930,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:19,231 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1580831416, now seen corresponding path program 446 times [2021-06-05 14:44:19,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:19,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596872675] [2021-06-05 14:44:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:19,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:19,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596872675] [2021-06-05 14:44:19,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596872675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:19,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309487059] [2021-06-05 14:44:19,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:19,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:19,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:19,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309487059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:19,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:19,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:19,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067493811] [2021-06-05 14:44:19,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:19,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:19,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:19,693 INFO L87 Difference]: Start difference. First operand 141 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:20,196 INFO L93 Difference]: Finished difference Result 233 states and 469 transitions. [2021-06-05 14:44:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:44:20,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:20,197 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:44:20,197 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 14:44:20,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:44:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 14:44:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 143. [2021-06-05 14:44:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 14:44:20,198 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 14:44:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:20,198 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 14:44:20,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 14:44:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:20,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:20,199 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:20,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21949,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:20,399 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:20,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2116061218, now seen corresponding path program 447 times [2021-06-05 14:44:20,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:20,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285668657] [2021-06-05 14:44:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:20,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285668657] [2021-06-05 14:44:20,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285668657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:20,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729742162] [2021-06-05 14:44:20,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:20,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:44:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:20,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729742162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:20,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:20,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562731289] [2021-06-05 14:44:20,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:20,754 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:21,112 INFO L93 Difference]: Finished difference Result 178 states and 377 transitions. [2021-06-05 14:44:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:21,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:21,113 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:44:21,113 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 14:44:21,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:44:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 14:44:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2021-06-05 14:44:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 14:44:21,114 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 14:44:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:21,115 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 14:44:21,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 14:44:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:21,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:21,115 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:21,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21997 [2021-06-05 14:44:21,325 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1814185543, now seen corresponding path program 448 times [2021-06-05 14:44:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:21,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142846964] [2021-06-05 14:44:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:21,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:21,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142846964] [2021-06-05 14:44:21,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142846964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756911487] [2021-06-05 14:44:21,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:21,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:21,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:21,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756911487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:21,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:21,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526477628] [2021-06-05 14:44:21,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:21,748 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:22,060 INFO L93 Difference]: Finished difference Result 162 states and 344 transitions. [2021-06-05 14:44:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:22,061 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:44:22,061 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:44:22,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:44:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-06-05 14:44:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 141 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 307 transitions. [2021-06-05 14:44:22,062 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 307 transitions. Word has length 19 [2021-06-05 14:44:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:22,062 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 307 transitions. [2021-06-05 14:44:22,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 307 transitions. [2021-06-05 14:44:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:22,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:22,063 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:22,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22018,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:22,263 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:22,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1528315896, now seen corresponding path program 449 times [2021-06-05 14:44:22,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:22,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990817234] [2021-06-05 14:44:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:22,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990817234] [2021-06-05 14:44:22,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990817234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075219193] [2021-06-05 14:44:22,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:22,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:22,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:22,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:22,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:22,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075219193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:22,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:22,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:22,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412883195] [2021-06-05 14:44:22,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:22,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:22,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:22,631 INFO L87 Difference]: Start difference. First operand 142 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:22,852 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-06-05 14:44:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:22,853 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:44:22,853 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:44:22,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:44:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-06-05 14:44:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 136 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 293 transitions. [2021-06-05 14:44:22,854 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 293 transitions. Word has length 19 [2021-06-05 14:44:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:22,855 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 293 transitions. [2021-06-05 14:44:22,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 293 transitions. [2021-06-05 14:44:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:22,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:22,855 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:23,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22043,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:23,055 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:23,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1547201935, now seen corresponding path program 450 times [2021-06-05 14:44:23,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:23,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083712838] [2021-06-05 14:44:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:23,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:23,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083712838] [2021-06-05 14:44:23,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083712838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:23,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542688628] [2021-06-05 14:44:23,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:23,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:23,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:23,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:23,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:23,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:23,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,627 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 14:44:23,628 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:44:23,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:23,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:23,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:23,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:23,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:23,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:23,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:23,767 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:23,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:23,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:23,823 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:23,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:23,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:23,847 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:44:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542688628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:23,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:23,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:23,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559862357] [2021-06-05 14:44:23,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:23,878 INFO L87 Difference]: Start difference. First operand 137 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:24,255 INFO L93 Difference]: Finished difference Result 191 states and 393 transitions. [2021-06-05 14:44:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:24,255 INFO L225 Difference]: With dead ends: 191 [2021-06-05 14:44:24,255 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 14:44:24,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 14:44:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2021-06-05 14:44:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-06-05 14:44:24,257 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-06-05 14:44:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:24,257 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-06-05 14:44:24,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-06-05 14:44:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:24,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:24,257 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:24,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22073,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:24,458 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 601707250, now seen corresponding path program 451 times [2021-06-05 14:44:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:24,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314926928] [2021-06-05 14:44:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:24,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:24,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314926928] [2021-06-05 14:44:24,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314926928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:24,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711853521] [2021-06-05 14:44:24,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711853521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:24,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:24,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:24,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403306722] [2021-06-05 14:44:24,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:24,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:24,975 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:25,645 INFO L93 Difference]: Finished difference Result 226 states and 455 transitions. [2021-06-05 14:44:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:44:25,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:25,645 INFO L225 Difference]: With dead ends: 226 [2021-06-05 14:44:25,645 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 14:44:25,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:44:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 14:44:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 144. [2021-06-05 14:44:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.202797202797203) internal successors, (315), 143 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 315 transitions. [2021-06-05 14:44:25,647 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 315 transitions. Word has length 19 [2021-06-05 14:44:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:25,647 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 315 transitions. [2021-06-05 14:44:25,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 315 transitions. [2021-06-05 14:44:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:25,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:25,647 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:25,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22094 [2021-06-05 14:44:25,848 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:25,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:25,848 INFO L82 PathProgramCache]: Analyzing trace with hash 66477448, now seen corresponding path program 452 times [2021-06-05 14:44:25,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:25,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715935702] [2021-06-05 14:44:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:25,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715935702] [2021-06-05 14:44:25,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715935702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625053774] [2021-06-05 14:44:25,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:26,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:26,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:26,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:26,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:26,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625053774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:26,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:26,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:26,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912774717] [2021-06-05 14:44:26,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:26,214 INFO L87 Difference]: Start difference. First operand 144 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:26,662 INFO L93 Difference]: Finished difference Result 186 states and 393 transitions. [2021-06-05 14:44:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:26,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:26,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:26,663 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:44:26,663 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 14:44:26,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:44:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 14:44:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2021-06-05 14:44:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.202797202797203) internal successors, (315), 143 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 315 transitions. [2021-06-05 14:44:26,664 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 315 transitions. Word has length 19 [2021-06-05 14:44:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:26,665 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 315 transitions. [2021-06-05 14:44:26,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 315 transitions. [2021-06-05 14:44:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:26,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:26,665 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:26,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22156 [2021-06-05 14:44:26,865 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash -298243087, now seen corresponding path program 453 times [2021-06-05 14:44:26,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:26,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756113827] [2021-06-05 14:44:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:26,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756113827] [2021-06-05 14:44:26,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756113827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293365475] [2021-06-05 14:44:26,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:27,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:44:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:27,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293365475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:27,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693644676] [2021-06-05 14:44:27,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:27,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:27,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:27,356 INFO L87 Difference]: Start difference. First operand 144 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:27,773 INFO L93 Difference]: Finished difference Result 176 states and 371 transitions. [2021-06-05 14:44:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:27,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:27,773 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:44:27,773 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 14:44:27,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:44:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 14:44:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2021-06-05 14:44:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 14:44:27,775 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 14:44:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:27,775 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 14:44:27,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 14:44:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:27,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:27,775 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:27,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22173,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:27,975 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 654222770, now seen corresponding path program 454 times [2021-06-05 14:44:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:27,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688770818] [2021-06-05 14:44:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:28,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:28,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688770818] [2021-06-05 14:44:28,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688770818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:28,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272383660] [2021-06-05 14:44:28,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:28,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:28,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:28,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:28,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:28,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272383660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:28,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:28,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:28,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445739193] [2021-06-05 14:44:28,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:28,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:28,329 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:28,623 INFO L93 Difference]: Finished difference Result 173 states and 367 transitions. [2021-06-05 14:44:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:28,623 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:44:28,623 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:44:28,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:44:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 142. [2021-06-05 14:44:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-06-05 14:44:28,625 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-06-05 14:44:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:28,625 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-06-05 14:44:28,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-06-05 14:44:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:28,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:28,625 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:28,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22192 [2021-06-05 14:44:28,826 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1694458568, now seen corresponding path program 455 times [2021-06-05 14:44:28,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:28,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558173304] [2021-06-05 14:44:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:28,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:28,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558173304] [2021-06-05 14:44:28,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558173304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:28,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586797264] [2021-06-05 14:44:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:29,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:29,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:29,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586797264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:29,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:29,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:29,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285227192] [2021-06-05 14:44:29,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:29,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:29,202 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:29,430 INFO L93 Difference]: Finished difference Result 164 states and 347 transitions. [2021-06-05 14:44:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:29,430 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:44:29,430 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 14:44:29,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 14:44:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2021-06-05 14:44:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1605839416058394) internal successors, (296), 137 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 296 transitions. [2021-06-05 14:44:29,432 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 296 transitions. Word has length 19 [2021-06-05 14:44:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:29,432 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 296 transitions. [2021-06-05 14:44:29,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 296 transitions. [2021-06-05 14:44:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:29,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:29,432 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:29,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22208,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:29,632 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1655334257, now seen corresponding path program 456 times [2021-06-05 14:44:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:29,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73616194] [2021-06-05 14:44:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:29,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73616194] [2021-06-05 14:44:29,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73616194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628963664] [2021-06-05 14:44:29,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:29,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:44:29,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:29,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628963664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:30,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:30,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:30,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527991502] [2021-06-05 14:44:30,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:30,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:30,085 INFO L87 Difference]: Start difference. First operand 138 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:30,382 INFO L93 Difference]: Finished difference Result 153 states and 320 transitions. [2021-06-05 14:44:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:30,383 INFO L225 Difference]: With dead ends: 153 [2021-06-05 14:44:30,383 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:44:30,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:44:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2021-06-05 14:44:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 14:44:30,384 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 14:44:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:30,384 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 14:44:30,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 14:44:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:30,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:30,384 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:30,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22238 [2021-06-05 14:44:30,585 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash 529488319, now seen corresponding path program 457 times [2021-06-05 14:44:30,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:30,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794765803] [2021-06-05 14:44:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:30,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:30,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794765803] [2021-06-05 14:44:30,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794765803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:30,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097216353] [2021-06-05 14:44:30,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:30,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:30,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:30,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:30,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:30,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:30,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:30,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:30,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:30,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,949 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:44:30,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:30,951 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:30,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,956 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:44:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:30,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097216353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:30,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:30,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:30,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822381445] [2021-06-05 14:44:30,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:30,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:30,961 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:31,181 INFO L93 Difference]: Finished difference Result 181 states and 381 transitions. [2021-06-05 14:44:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:31,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:31,181 INFO L225 Difference]: With dead ends: 181 [2021-06-05 14:44:31,181 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:44:31,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:44:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2021-06-05 14:44:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 14:44:31,183 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 14:44:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:31,183 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 14:44:31,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 14:44:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:31,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:31,183 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:31,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22259 [2021-06-05 14:44:31,384 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash -855689427, now seen corresponding path program 458 times [2021-06-05 14:44:31,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:31,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225043003] [2021-06-05 14:44:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:31,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225043003] [2021-06-05 14:44:31,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225043003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310828825] [2021-06-05 14:44:31,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:31,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:31,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:31,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:31,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:31,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:31,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:31,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:31,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:31,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,747 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:44:31,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:31,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:31,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,754 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:44:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:31,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310828825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:31,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:31,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:31,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7220156] [2021-06-05 14:44:31,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:31,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:31,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:31,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:31,759 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:32,085 INFO L93 Difference]: Finished difference Result 188 states and 395 transitions. [2021-06-05 14:44:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:32,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:32,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:32,086 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:44:32,086 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:44:32,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:44:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2021-06-05 14:44:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 14:44:32,087 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 14:44:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:32,087 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 14:44:32,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 14:44:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:32,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:32,087 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22296,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:32,288 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1870203905, now seen corresponding path program 459 times [2021-06-05 14:44:32,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:32,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972742177] [2021-06-05 14:44:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:32,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:32,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972742177] [2021-06-05 14:44:32,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972742177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:32,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596975420] [2021-06-05 14:44:32,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:32,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:44:32,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:32,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:32,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:32,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:32,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:32,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:32,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:32,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:32,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:32,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:32,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:32,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:32,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,765 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:44:32,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:32,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,790 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:44:32,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:32,791 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:44:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:32,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596975420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:32,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:32,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:32,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841999881] [2021-06-05 14:44:32,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:32,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:32,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:32,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:32,814 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:33,241 INFO L93 Difference]: Finished difference Result 203 states and 425 transitions. [2021-06-05 14:44:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:44:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:33,241 INFO L225 Difference]: With dead ends: 203 [2021-06-05 14:44:33,241 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 14:44:33,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:44:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 14:44:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 135. [2021-06-05 14:44:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.156716417910448) internal successors, (289), 134 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 289 transitions. [2021-06-05 14:44:33,243 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 289 transitions. Word has length 19 [2021-06-05 14:44:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:33,243 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 289 transitions. [2021-06-05 14:44:33,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 289 transitions. [2021-06-05 14:44:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:33,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:33,243 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:33,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22326,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:33,444 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:33,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:33,444 INFO L82 PathProgramCache]: Analyzing trace with hash 184546371, now seen corresponding path program 460 times [2021-06-05 14:44:33,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:33,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103485637] [2021-06-05 14:44:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:33,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:33,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103485637] [2021-06-05 14:44:33,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103485637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:33,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295145843] [2021-06-05 14:44:33,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:33,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:33,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:33,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:33,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:33,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:33,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:33,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:33,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:33,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:33,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,798 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:44:33,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:33,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:33,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,805 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:44:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:33,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295145843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:33,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:33,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:33,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307586000] [2021-06-05 14:44:33,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:33,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:33,810 INFO L87 Difference]: Start difference. First operand 135 states and 289 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:34,072 INFO L93 Difference]: Finished difference Result 179 states and 377 transitions. [2021-06-05 14:44:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:34,072 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:44:34,072 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:44:34,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:44:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-06-05 14:44:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 136 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 293 transitions. [2021-06-05 14:44:34,074 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 293 transitions. Word has length 19 [2021-06-05 14:44:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:34,074 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 293 transitions. [2021-06-05 14:44:34,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 293 transitions. [2021-06-05 14:44:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:34,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:34,074 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:34,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22410 [2021-06-05 14:44:34,275 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -829968107, now seen corresponding path program 461 times [2021-06-05 14:44:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:34,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858215219] [2021-06-05 14:44:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:34,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:34,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858215219] [2021-06-05 14:44:34,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858215219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:34,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609927023] [2021-06-05 14:44:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:34,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:44:34,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:34,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:34,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:34,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:34,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:34,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:34,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,662 INFO L628 ElimStorePlain]: treesize reduction 45, result has 42.3 percent of original size [2021-06-05 14:44:34,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:34,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,688 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:44:34,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:34,688 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-06-05 14:44:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:34,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609927023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:34,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:34,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:34,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071753229] [2021-06-05 14:44:34,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:34,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:34,711 INFO L87 Difference]: Start difference. First operand 137 states and 293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:35,054 INFO L93 Difference]: Finished difference Result 196 states and 411 transitions. [2021-06-05 14:44:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:44:35,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:35,055 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:44:35,055 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:44:35,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:44:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:44:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 138. [2021-06-05 14:44:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.153284671532847) internal successors, (295), 137 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 295 transitions. [2021-06-05 14:44:35,056 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 295 transitions. Word has length 19 [2021-06-05 14:44:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:35,056 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 295 transitions. [2021-06-05 14:44:35,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 295 transitions. [2021-06-05 14:44:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:35,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:35,057 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:35,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22440 [2021-06-05 14:44:35,257 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:35,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1277305830, now seen corresponding path program 462 times [2021-06-05 14:44:35,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:35,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929169121] [2021-06-05 14:44:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:35,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:35,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929169121] [2021-06-05 14:44:35,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929169121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:35,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862205045] [2021-06-05 14:44:35,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:35,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:35,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:35,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:35,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862205045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:35,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:35,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:35,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844204291] [2021-06-05 14:44:35,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:35,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:35,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:35,651 INFO L87 Difference]: Start difference. First operand 138 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:35,893 INFO L93 Difference]: Finished difference Result 158 states and 336 transitions. [2021-06-05 14:44:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:35,893 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:44:35,893 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 14:44:35,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 14:44:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 136. [2021-06-05 14:44:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1555555555555554) internal successors, (291), 135 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 291 transitions. [2021-06-05 14:44:35,895 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 291 transitions. Word has length 19 [2021-06-05 14:44:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:35,895 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 291 transitions. [2021-06-05 14:44:35,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 291 transitions. [2021-06-05 14:44:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:35,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:35,895 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:36,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22476 [2021-06-05 14:44:36,096 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:36,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1456497603, now seen corresponding path program 463 times [2021-06-05 14:44:36,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:36,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543651362] [2021-06-05 14:44:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:36,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:36,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543651362] [2021-06-05 14:44:36,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543651362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:36,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250748339] [2021-06-05 14:44:36,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:36,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:36,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:36,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:36,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:36,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,538 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:44:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:36,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:36,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:36,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:36,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:36,666 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:36,694 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:36,721 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:36,744 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:44:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:36,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250748339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:36,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:36,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:36,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240635423] [2021-06-05 14:44:36,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:36,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:36,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:36,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:36,772 INFO L87 Difference]: Start difference. First operand 136 states and 291 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:37,039 INFO L93 Difference]: Finished difference Result 181 states and 375 transitions. [2021-06-05 14:44:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:44:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:37,040 INFO L225 Difference]: With dead ends: 181 [2021-06-05 14:44:37,040 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:44:37,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:44:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2021-06-05 14:44:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1605839416058394) internal successors, (296), 137 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 296 transitions. [2021-06-05 14:44:37,041 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 296 transitions. Word has length 19 [2021-06-05 14:44:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:37,041 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 296 transitions. [2021-06-05 14:44:37,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 296 transitions. [2021-06-05 14:44:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:37,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:37,042 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:37,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22532 [2021-06-05 14:44:37,242 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:37,242 INFO L82 PathProgramCache]: Analyzing trace with hash -689560508, now seen corresponding path program 464 times [2021-06-05 14:44:37,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:37,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271916685] [2021-06-05 14:44:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:37,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:37,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271916685] [2021-06-05 14:44:37,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271916685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:37,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533986932] [2021-06-05 14:44:37,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:37,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:37,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:37,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533986932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:37,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:37,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:37,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679313206] [2021-06-05 14:44:37,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:37,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:37,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:37,680 INFO L87 Difference]: Start difference. First operand 138 states and 296 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:37,947 INFO L93 Difference]: Finished difference Result 224 states and 462 transitions. [2021-06-05 14:44:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:44:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:37,948 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:44:37,948 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 14:44:37,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:44:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 14:44:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 139. [2021-06-05 14:44:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-06-05 14:44:37,949 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 19 [2021-06-05 14:44:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:37,950 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-06-05 14:44:37,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-06-05 14:44:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:37,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:37,950 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:38,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22555,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:38,150 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1224790310, now seen corresponding path program 465 times [2021-06-05 14:44:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:38,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524509888] [2021-06-05 14:44:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:38,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:38,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524509888] [2021-06-05 14:44:38,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524509888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:38,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396083410] [2021-06-05 14:44:38,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:38,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:44:38,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:38,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:38,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396083410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:38,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:38,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:38,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292949734] [2021-06-05 14:44:38,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:38,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:38,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:38,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:38,471 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:38,732 INFO L93 Difference]: Finished difference Result 177 states and 375 transitions. [2021-06-05 14:44:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:44:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:38,733 INFO L225 Difference]: With dead ends: 177 [2021-06-05 14:44:38,733 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 14:44:38,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 14:44:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2021-06-05 14:44:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.161764705882353) internal successors, (294), 136 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 294 transitions. [2021-06-05 14:44:38,734 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 294 transitions. Word has length 19 [2021-06-05 14:44:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:38,734 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 294 transitions. [2021-06-05 14:44:38,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 294 transitions. [2021-06-05 14:44:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:38,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:38,735 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:38,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22610 [2021-06-05 14:44:38,935 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510845, now seen corresponding path program 466 times [2021-06-05 14:44:38,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:38,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970407730] [2021-06-05 14:44:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:39,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970407730] [2021-06-05 14:44:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970407730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983667781] [2021-06-05 14:44:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:39,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:39,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:39,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:39,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:39,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983667781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:39,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:39,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:39,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190646461] [2021-06-05 14:44:39,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:39,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:39,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:39,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:39,331 INFO L87 Difference]: Start difference. First operand 137 states and 294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:39,598 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 14:44:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:39,599 INFO L225 Difference]: With dead ends: 153 [2021-06-05 14:44:39,599 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:44:39,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:44:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2021-06-05 14:44:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1578947368421053) internal successors, (287), 133 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 287 transitions. [2021-06-05 14:44:39,600 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 287 transitions. Word has length 19 [2021-06-05 14:44:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:39,601 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 287 transitions. [2021-06-05 14:44:39,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 287 transitions. [2021-06-05 14:44:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:39,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:39,601 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:39,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22630,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:39,801 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1927882259, now seen corresponding path program 467 times [2021-06-05 14:44:39,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:39,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144157688] [2021-06-05 14:44:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:39,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:39,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144157688] [2021-06-05 14:44:39,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144157688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:39,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129849010] [2021-06-05 14:44:39,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:39,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:39,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:40,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:40,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:40,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:40,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:40,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:40,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:40,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,186 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:44:40,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:40,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:40,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,193 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:44:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:40,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129849010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:40,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:40,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:40,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899360010] [2021-06-05 14:44:40,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:40,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:40,198 INFO L87 Difference]: Start difference. First operand 134 states and 287 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:40,459 INFO L93 Difference]: Finished difference Result 177 states and 373 transitions. [2021-06-05 14:44:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:40,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:40,459 INFO L225 Difference]: With dead ends: 177 [2021-06-05 14:44:40,459 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 14:44:40,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 14:44:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2021-06-05 14:44:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1578947368421053) internal successors, (287), 133 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 287 transitions. [2021-06-05 14:44:40,461 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 287 transitions. Word has length 19 [2021-06-05 14:44:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:40,461 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 287 transitions. [2021-06-05 14:44:40,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 287 transitions. [2021-06-05 14:44:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:40,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:40,461 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:40,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22652 [2021-06-05 14:44:40,662 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:40,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:40,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1352570559, now seen corresponding path program 468 times [2021-06-05 14:44:40,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:40,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744922326] [2021-06-05 14:44:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:40,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744922326] [2021-06-05 14:44:40,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744922326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409207556] [2021-06-05 14:44:40,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:40,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:44:40,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:41,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:41,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:41,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:41,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:41,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:41,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:41,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:41,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:41,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:41,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:41,068 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:41,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:41,073 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,106 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-06-05 14:44:41,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:41,108 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,131 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:44:41,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:41,132 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-06-05 14:44:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409207556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:41,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:41,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:41,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738979047] [2021-06-05 14:44:41,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:41,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:41,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:41,154 INFO L87 Difference]: Start difference. First operand 134 states and 287 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:41,382 INFO L93 Difference]: Finished difference Result 191 states and 401 transitions. [2021-06-05 14:44:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:41,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:41,382 INFO L225 Difference]: With dead ends: 191 [2021-06-05 14:44:41,383 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 14:44:41,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 14:44:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 135. [2021-06-05 14:44:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.156716417910448) internal successors, (289), 134 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 289 transitions. [2021-06-05 14:44:41,384 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 289 transitions. Word has length 19 [2021-06-05 14:44:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:41,384 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 289 transitions. [2021-06-05 14:44:41,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 289 transitions. [2021-06-05 14:44:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:41,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:41,384 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:41,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22694,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:41,585 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash 905232836, now seen corresponding path program 469 times [2021-06-05 14:44:41,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:41,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032854907] [2021-06-05 14:44:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:41,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:41,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032854907] [2021-06-05 14:44:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032854907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:41,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259895959] [2021-06-05 14:44:41,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:41,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:41,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:41,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259895959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:41,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:41,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:41,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690566440] [2021-06-05 14:44:41,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:41,978 INFO L87 Difference]: Start difference. First operand 135 states and 289 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:42,161 INFO L93 Difference]: Finished difference Result 156 states and 331 transitions. [2021-06-05 14:44:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:42,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:42,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:42,161 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:44:42,161 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:44:42,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:44:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 133. [2021-06-05 14:44:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.159090909090909) internal successors, (285), 132 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 285 transitions. [2021-06-05 14:44:42,163 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 285 transitions. Word has length 19 [2021-06-05 14:44:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:42,163 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 285 transitions. [2021-06-05 14:44:42,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 285 transitions. [2021-06-05 14:44:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:42,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:42,163 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:42,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22756 [2021-06-05 14:44:42,364 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:42,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:42,364 INFO L82 PathProgramCache]: Analyzing trace with hash -655931027, now seen corresponding path program 470 times [2021-06-05 14:44:42,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:42,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997908068] [2021-06-05 14:44:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:42,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:42,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997908068] [2021-06-05 14:44:42,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997908068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:42,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887613203] [2021-06-05 14:44:42,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:42,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:42,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:42,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:42,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:42,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:42,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:42,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,802 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-06-05 14:44:42,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:42,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:42,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:42,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:42,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:42,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:42,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:42,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:42,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:42,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:42,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:42,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:42,986 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:43,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:43,010 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:44:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:43,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887613203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:43,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:43,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:43,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810405291] [2021-06-05 14:44:43,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:43,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:43,038 INFO L87 Difference]: Start difference. First operand 133 states and 285 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:43,278 INFO L93 Difference]: Finished difference Result 176 states and 365 transitions. [2021-06-05 14:44:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:43,278 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:44:43,278 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:44:43,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:44:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 135. [2021-06-05 14:44:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-06-05 14:44:43,280 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-06-05 14:44:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:43,280 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-06-05 14:44:43,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-06-05 14:44:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:43,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:43,280 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:43,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22813 [2021-06-05 14:44:43,481 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1492978158, now seen corresponding path program 471 times [2021-06-05 14:44:43,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:43,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341892270] [2021-06-05 14:44:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:43,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341892270] [2021-06-05 14:44:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341892270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539029803] [2021-06-05 14:44:43,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:43,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:44:43,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:43,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539029803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:43,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:43,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:43,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958142460] [2021-06-05 14:44:43,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:43,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:43,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:43,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:43,872 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:44,217 INFO L93 Difference]: Finished difference Result 215 states and 442 transitions. [2021-06-05 14:44:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:44:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:44,217 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:44:44,217 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:44:44,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:44:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:44:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 136. [2021-06-05 14:44:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.185185185185185) internal successors, (295), 135 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2021-06-05 14:44:44,219 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 19 [2021-06-05 14:44:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:44,219 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2021-06-05 14:44:44,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2021-06-05 14:44:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:44,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:44,219 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:44,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22836,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:44,420 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash 957748356, now seen corresponding path program 472 times [2021-06-05 14:44:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:44,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977777316] [2021-06-05 14:44:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:44,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:44,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977777316] [2021-06-05 14:44:44,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977777316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:44,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631986460] [2021-06-05 14:44:44,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:44,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:44,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:44,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631986460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:44,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:44,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:44,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535358945] [2021-06-05 14:44:44,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:44,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:44,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:44,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:44,737 INFO L87 Difference]: Start difference. First operand 136 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:45,000 INFO L93 Difference]: Finished difference Result 173 states and 367 transitions. [2021-06-05 14:44:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:45,001 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:44:45,001 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:44:45,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:44:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2021-06-05 14:44:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 14:44:45,002 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 14:44:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:45,002 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 14:44:45,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 14:44:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:45,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:45,003 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:45,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22881,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:45,203 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:45,204 INFO L82 PathProgramCache]: Analyzing trace with hash 593027821, now seen corresponding path program 473 times [2021-06-05 14:44:45,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:45,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560743363] [2021-06-05 14:44:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:45,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560743363] [2021-06-05 14:44:45,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560743363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295793792] [2021-06-05 14:44:45,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:45,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:45,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:45,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:45,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295793792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:45,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:45,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361027442] [2021-06-05 14:44:45,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:45,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:45,588 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:45,787 INFO L93 Difference]: Finished difference Result 149 states and 314 transitions. [2021-06-05 14:44:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:45,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:45,787 INFO L225 Difference]: With dead ends: 149 [2021-06-05 14:44:45,787 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:44:45,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:44:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2021-06-05 14:44:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-06-05 14:44:45,789 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 19 [2021-06-05 14:44:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:45,789 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-06-05 14:44:45,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-06-05 14:44:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:45,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:45,789 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:46,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22902 [2021-06-05 14:44:46,003 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:46,004 INFO L82 PathProgramCache]: Analyzing trace with hash 384304771, now seen corresponding path program 474 times [2021-06-05 14:44:46,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:46,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505564095] [2021-06-05 14:44:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:46,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:46,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505564095] [2021-06-05 14:44:46,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505564095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:46,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817703541] [2021-06-05 14:44:46,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:46,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:46,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:46,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:46,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,527 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-06-05 14:44:46,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:46,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:46,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:46,597 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:46,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:46,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:46,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:46,715 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:46,739 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:44:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:46,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817703541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:46,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:46,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:46,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627965287] [2021-06-05 14:44:46,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:46,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:46,768 INFO L87 Difference]: Start difference. First operand 132 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:46,995 INFO L93 Difference]: Finished difference Result 182 states and 378 transitions. [2021-06-05 14:44:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:46,996 INFO L225 Difference]: With dead ends: 182 [2021-06-05 14:44:46,996 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 14:44:46,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 14:44:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2021-06-05 14:44:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.171641791044776) internal successors, (291), 134 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 291 transitions. [2021-06-05 14:44:46,997 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 291 transitions. Word has length 19 [2021-06-05 14:44:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:46,997 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 291 transitions. [2021-06-05 14:44:46,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 291 transitions. [2021-06-05 14:44:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:46,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:46,998 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:47,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22923,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:47,198 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:47,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1761753340, now seen corresponding path program 475 times [2021-06-05 14:44:47,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:47,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286960222] [2021-06-05 14:44:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:47,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:47,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286960222] [2021-06-05 14:44:47,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286960222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:47,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952111997] [2021-06-05 14:44:47,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:47,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952111997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:47,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:47,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:47,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660455291] [2021-06-05 14:44:47,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:47,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:47,657 INFO L87 Difference]: Start difference. First operand 135 states and 291 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:48,195 INFO L93 Difference]: Finished difference Result 240 states and 495 transitions. [2021-06-05 14:44:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:44:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:48,196 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:44:48,196 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 14:44:48,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:44:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 14:44:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 137. [2021-06-05 14:44:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-06-05 14:44:48,198 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 19 [2021-06-05 14:44:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:48,198 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-06-05 14:44:48,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-06-05 14:44:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:48,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:48,198 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:48,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22946,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:48,398 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:48,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1997984154, now seen corresponding path program 476 times [2021-06-05 14:44:48,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:48,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121547747] [2021-06-05 14:44:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:48,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:48,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121547747] [2021-06-05 14:44:48,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121547747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:48,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510822052] [2021-06-05 14:44:48,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:48,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:48,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:48,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:48,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510822052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:48,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:48,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:48,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869841918] [2021-06-05 14:44:48,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:48,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:48,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:48,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:48,749 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:49,118 INFO L93 Difference]: Finished difference Result 201 states and 426 transitions. [2021-06-05 14:44:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:44:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:49,118 INFO L225 Difference]: With dead ends: 201 [2021-06-05 14:44:49,119 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 14:44:49,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:44:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 14:44:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 137. [2021-06-05 14:44:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-06-05 14:44:49,120 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 19 [2021-06-05 14:44:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:49,120 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-06-05 14:44:49,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-06-05 14:44:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:49,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:49,120 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:49,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23006,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:49,321 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:49,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1633263619, now seen corresponding path program 477 times [2021-06-05 14:44:49,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:49,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597925092] [2021-06-05 14:44:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:49,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597925092] [2021-06-05 14:44:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597925092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540285024] [2021-06-05 14:44:49,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:49,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:44:49,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:49,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540285024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:49,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:49,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654056730] [2021-06-05 14:44:49,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:49,749 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:50,001 INFO L93 Difference]: Finished difference Result 163 states and 345 transitions. [2021-06-05 14:44:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:50,002 INFO L225 Difference]: With dead ends: 163 [2021-06-05 14:44:50,002 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 14:44:50,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 14:44:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2021-06-05 14:44:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1925925925925926) internal successors, (296), 135 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 296 transitions. [2021-06-05 14:44:50,003 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 296 transitions. Word has length 19 [2021-06-05 14:44:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:50,003 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 296 transitions. [2021-06-05 14:44:50,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 296 transitions. [2021-06-05 14:44:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:50,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:50,004 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:50,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23035 [2021-06-05 14:44:50,209 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1709237820, now seen corresponding path program 478 times [2021-06-05 14:44:50,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:50,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36506292] [2021-06-05 14:44:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:50,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:50,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36506292] [2021-06-05 14:44:50,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36506292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:50,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238685780] [2021-06-05 14:44:50,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:50,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:50,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:50,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238685780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:50,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:50,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:44:50,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629641435] [2021-06-05 14:44:50,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:50,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:50,528 INFO L87 Difference]: Start difference. First operand 136 states and 296 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:50,741 INFO L93 Difference]: Finished difference Result 179 states and 380 transitions. [2021-06-05 14:44:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:50,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:50,741 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:44:50,741 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:44:50,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:44:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 133. [2021-06-05 14:44:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-06-05 14:44:50,743 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-06-05 14:44:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:50,743 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-06-05 14:44:50,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-06-05 14:44:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:50,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:50,743 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:50,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23057 [2021-06-05 14:44:50,943 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash 620571087, now seen corresponding path program 479 times [2021-06-05 14:44:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:50,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326052907] [2021-06-05 14:44:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:51,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:51,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326052907] [2021-06-05 14:44:51,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326052907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:51,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353501887] [2021-06-05 14:44:51,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:51,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:51,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:51,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353501887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:51,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:51,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:44:51,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384069465] [2021-06-05 14:44:51,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:51,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:51,332 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:51,560 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-06-05 14:44:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:51,560 INFO L225 Difference]: With dead ends: 149 [2021-06-05 14:44:51,560 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 14:44:51,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 14:44:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2021-06-05 14:44:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 14:44:51,562 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 14:44:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:51,562 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 14:44:51,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 14:44:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:51,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:51,562 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:51,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23077,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:51,762 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1306306947, now seen corresponding path program 480 times [2021-06-05 14:44:51,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:51,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594592173] [2021-06-05 14:44:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:51,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:51,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594592173] [2021-06-05 14:44:51,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594592173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:51,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818603788] [2021-06-05 14:44:51,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:51,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:44:51,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:51,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:51,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:52,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:52,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:52,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:52,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,121 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-06-05 14:44:52,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:52,123 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:52,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,128 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-06-05 14:44:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:52,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818603788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:52,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:52,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:44:52,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429852364] [2021-06-05 14:44:52,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:44:52,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:52,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:44:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:44:52,133 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:52,401 INFO L93 Difference]: Finished difference Result 173 states and 365 transitions. [2021-06-05 14:44:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:52,402 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:44:52,402 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:44:52,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:44:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 130. [2021-06-05 14:44:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 14:44:52,403 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 14:44:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:52,403 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 14:44:52,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 14:44:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:52,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:52,403 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:52,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23095,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:52,604 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash 291792469, now seen corresponding path program 481 times [2021-06-05 14:44:52,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:52,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115033211] [2021-06-05 14:44:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:52,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115033211] [2021-06-05 14:44:52,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115033211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914412964] [2021-06-05 14:44:52,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:52,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:52,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:52,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:52,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:52,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,991 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:44:52,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:52,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,017 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:44:53,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:53,018 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:44:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:53,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914412964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:53,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:53,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:44:53,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693963470] [2021-06-05 14:44:53,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:44:53,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:44:53,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:44:53,039 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:53,261 INFO L93 Difference]: Finished difference Result 186 states and 391 transitions. [2021-06-05 14:44:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:44:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:53,262 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:44:53,262 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 14:44:53,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 14:44:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 130. [2021-06-05 14:44:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 14:44:53,263 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 14:44:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:53,263 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 14:44:53,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 14:44:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:53,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:53,264 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:53,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23127 [2021-06-05 14:44:53,464 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1543175134, now seen corresponding path program 482 times [2021-06-05 14:44:53,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:53,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047484521] [2021-06-05 14:44:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:53,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047484521] [2021-06-05 14:44:53,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047484521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611054468] [2021-06-05 14:44:53,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:53,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:53,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611054468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:53,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:53,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:44:53,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030393970] [2021-06-05 14:44:53,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:44:53,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:44:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:44:53,840 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:54,042 INFO L93 Difference]: Finished difference Result 152 states and 323 transitions. [2021-06-05 14:44:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:44:54,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:54,042 INFO L225 Difference]: With dead ends: 152 [2021-06-05 14:44:54,042 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:44:54,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:44:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2021-06-05 14:44:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1507936507936507) internal successors, (271), 126 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 271 transitions. [2021-06-05 14:44:54,044 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 271 transitions. Word has length 19 [2021-06-05 14:44:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:54,044 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 271 transitions. [2021-06-05 14:44:54,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 271 transitions. [2021-06-05 14:44:54,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:54,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:54,044 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:54,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23174,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:54,244 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1716709117, now seen corresponding path program 483 times [2021-06-05 14:44:54,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:54,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977384572] [2021-06-05 14:44:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:54,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:54,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977384572] [2021-06-05 14:44:54,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977384572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:54,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633071167] [2021-06-05 14:44:54,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:54,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:44:54,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:54,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:54,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:54,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:54,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:54,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:44:54,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:54,668 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-06-05 14:44:54,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:54,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:54,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:54,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:54,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:54,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:54,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:54,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:54,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:54,732 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:44:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:54,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633071167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:54,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:54,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:44:54,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004296644] [2021-06-05 14:44:54,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:54,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:54,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:54,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:54,761 INFO L87 Difference]: Start difference. First operand 127 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:55,089 INFO L93 Difference]: Finished difference Result 184 states and 372 transitions. [2021-06-05 14:44:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:44:55,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:55,090 INFO L225 Difference]: With dead ends: 184 [2021-06-05 14:44:55,090 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 14:44:55,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:44:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 14:44:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 129. [2021-06-05 14:44:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-06-05 14:44:55,092 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-06-05 14:44:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:55,092 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-06-05 14:44:55,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-06-05 14:44:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:55,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:55,092 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:55,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23211 [2021-06-05 14:44:55,292 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:55,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash 432200068, now seen corresponding path program 484 times [2021-06-05 14:44:55,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:55,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809345353] [2021-06-05 14:44:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:55,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:55,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809345353] [2021-06-05 14:44:55,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809345353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:55,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285576772] [2021-06-05 14:44:55,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:55,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:55,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285576772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:55,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:55,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:44:55,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836960669] [2021-06-05 14:44:55,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:55,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:55,786 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:56,239 INFO L93 Difference]: Finished difference Result 222 states and 447 transitions. [2021-06-05 14:44:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:44:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:56,240 INFO L225 Difference]: With dead ends: 222 [2021-06-05 14:44:56,240 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:44:56,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:44:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:44:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 130. [2021-06-05 14:44:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1782945736434107) internal successors, (281), 129 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 281 transitions. [2021-06-05 14:44:56,241 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 281 transitions. Word has length 19 [2021-06-05 14:44:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:56,241 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 281 transitions. [2021-06-05 14:44:56,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 281 transitions. [2021-06-05 14:44:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:56,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:56,242 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:56,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23231,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:56,442 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -103029734, now seen corresponding path program 485 times [2021-06-05 14:44:56,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:56,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493900360] [2021-06-05 14:44:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:56,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:56,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493900360] [2021-06-05 14:44:56,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493900360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:56,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438542778] [2021-06-05 14:44:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:56,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:56,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:56,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:56,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438542778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:56,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:56,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:44:56,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940762181] [2021-06-05 14:44:56,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:56,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:56,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:56,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:56,774 INFO L87 Difference]: Start difference. First operand 130 states and 281 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:57,078 INFO L93 Difference]: Finished difference Result 162 states and 341 transitions. [2021-06-05 14:44:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:44:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:57,079 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:44:57,079 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 14:44:57,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:44:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 14:44:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2021-06-05 14:44:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.15748031496063) internal successors, (274), 127 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 274 transitions. [2021-06-05 14:44:57,080 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 274 transitions. Word has length 19 [2021-06-05 14:44:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:57,080 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 274 transitions. [2021-06-05 14:44:57,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 274 transitions. [2021-06-05 14:44:57,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:57,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:57,081 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:57,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23314 [2021-06-05 14:44:57,297 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:57,297 INFO L82 PathProgramCache]: Analyzing trace with hash -467750269, now seen corresponding path program 486 times [2021-06-05 14:44:57,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:57,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614119335] [2021-06-05 14:44:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:57,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:57,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614119335] [2021-06-05 14:44:57,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614119335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:57,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775100914] [2021-06-05 14:44:57,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:57,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:57,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:57,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775100914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:57,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:57,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:44:57,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117355108] [2021-06-05 14:44:57,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:57,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:57,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:57,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:57,682 INFO L87 Difference]: Start difference. First operand 128 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:57,921 INFO L93 Difference]: Finished difference Result 144 states and 302 transitions. [2021-06-05 14:44:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:57,921 INFO L225 Difference]: With dead ends: 144 [2021-06-05 14:44:57,921 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 14:44:57,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 14:44:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 126. [2021-06-05 14:44:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.152) internal successors, (269), 125 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 269 transitions. [2021-06-05 14:44:57,922 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 269 transitions. Word has length 19 [2021-06-05 14:44:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:57,922 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 269 transitions. [2021-06-05 14:44:57,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 269 transitions. [2021-06-05 14:44:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:57,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:57,923 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:58,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23331,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:58,123 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash -676473319, now seen corresponding path program 487 times [2021-06-05 14:44:58,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:58,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402078670] [2021-06-05 14:44:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:58,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402078670] [2021-06-05 14:44:58,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402078670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853913844] [2021-06-05 14:44:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:58,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:58,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:58,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:58,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,615 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-06-05 14:44:58,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:58,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:58,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:58,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:58,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:58,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:58,717 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:58,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:44:58,746 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:58,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:58,775 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:44:58,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:58,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:58,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:58,825 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:44:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:58,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853913844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:58,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:58,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:44:58,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680540898] [2021-06-05 14:44:58,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:58,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:58,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:58,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:58,854 INFO L87 Difference]: Start difference. First operand 126 states and 269 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:59,155 INFO L93 Difference]: Finished difference Result 162 states and 335 transitions. [2021-06-05 14:44:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:44:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:59,156 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:44:59,156 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 14:44:59,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 14:44:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2021-06-05 14:44:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-06-05 14:44:59,157 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 19 [2021-06-05 14:44:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:59,157 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-06-05 14:44:59,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-06-05 14:44:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:44:59,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:59,157 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:59,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23351,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:59,358 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1472435866, now seen corresponding path program 488 times [2021-06-05 14:44:59,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:59,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960495402] [2021-06-05 14:44:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:59,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960495402] [2021-06-05 14:44:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960495402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162436704] [2021-06-05 14:44:59,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:59,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:44:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:59,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162436704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:59,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:59,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:44:59,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210403955] [2021-06-05 14:44:59,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:59,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:59,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:59,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:59,791 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:00,258 INFO L93 Difference]: Finished difference Result 215 states and 431 transitions. [2021-06-05 14:45:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:45:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:00,258 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:45:00,258 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:45:00,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:45:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:45:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 131. [2021-06-05 14:45:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 14:45:00,260 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 14:45:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:00,260 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 14:45:00,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 14:45:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:00,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:00,260 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:00,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23372,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:00,476 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash 937206064, now seen corresponding path program 489 times [2021-06-05 14:45:00,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:00,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045330341] [2021-06-05 14:45:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:00,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045330341] [2021-06-05 14:45:00,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045330341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143982451] [2021-06-05 14:45:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:00,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:00,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:00,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:00,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:00,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143982451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:00,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:00,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:45:00,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780511037] [2021-06-05 14:45:00,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:00,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:00,819 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:01,079 INFO L93 Difference]: Finished difference Result 166 states and 351 transitions. [2021-06-05 14:45:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:45:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:01,080 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:45:01,080 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:45:01,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:45:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 131. [2021-06-05 14:45:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 14:45:01,081 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 14:45:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:01,081 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 14:45:01,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 14:45:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:01,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:01,081 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:01,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23424 [2021-06-05 14:45:01,282 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:01,282 INFO L82 PathProgramCache]: Analyzing trace with hash 572485529, now seen corresponding path program 490 times [2021-06-05 14:45:01,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:01,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98141502] [2021-06-05 14:45:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:01,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:01,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98141502] [2021-06-05 14:45:01,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98141502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:01,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605328196] [2021-06-05 14:45:01,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:01,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:01,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:01,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:01,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605328196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:01,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:01,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:45:01,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474113055] [2021-06-05 14:45:01,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:01,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:01,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:01,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:01,726 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:02,044 INFO L93 Difference]: Finished difference Result 150 states and 318 transitions. [2021-06-05 14:45:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:45:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:02,045 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:45:02,045 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 14:45:02,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:45:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 14:45:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2021-06-05 14:45:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1782945736434107) internal successors, (281), 129 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 281 transitions. [2021-06-05 14:45:02,046 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 281 transitions. Word has length 19 [2021-06-05 14:45:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:02,046 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 281 transitions. [2021-06-05 14:45:02,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 281 transitions. [2021-06-05 14:45:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:02,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:02,046 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:02,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23440,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:02,247 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:02,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1524951386, now seen corresponding path program 491 times [2021-06-05 14:45:02,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:02,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090701178] [2021-06-05 14:45:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:02,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090701178] [2021-06-05 14:45:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090701178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513612120] [2021-06-05 14:45:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:02,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:02,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:02,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:02,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513612120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:02,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:02,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:02,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984570331] [2021-06-05 14:45:02,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:02,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:02,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:02,555 INFO L87 Difference]: Start difference. First operand 130 states and 281 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:02,773 INFO L93 Difference]: Finished difference Result 160 states and 337 transitions. [2021-06-05 14:45:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:45:02,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:02,774 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:45:02,774 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 14:45:02,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:02,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 14:45:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-06-05 14:45:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 14:45:02,775 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 14:45:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:02,775 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 14:45:02,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 14:45:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:02,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:02,778 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:02,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23461,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:02,979 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:02,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1506065347, now seen corresponding path program 492 times [2021-06-05 14:45:02,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:02,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428886240] [2021-06-05 14:45:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:03,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:03,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428886240] [2021-06-05 14:45:03,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428886240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:03,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274751344] [2021-06-05 14:45:03,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:03,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:45:03,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:03,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:03,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:03,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:03,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:45:03,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,532 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-06-05 14:45:03,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:03,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:03,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:03,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:03,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:03,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:03,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:03,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:03,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:03,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:03,698 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:03,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:03,725 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:03,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:03,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:03,749 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:45:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:03,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274751344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:03,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:03,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:45:03,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582863654] [2021-06-05 14:45:03,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:03,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:03,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:03,779 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:04,307 INFO L93 Difference]: Finished difference Result 183 states and 376 transitions. [2021-06-05 14:45:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:45:04,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:04,308 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:45:04,308 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:45:04,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:45:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:45:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-06-05 14:45:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.171875) internal successors, (278), 128 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 278 transitions. [2021-06-05 14:45:04,309 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 278 transitions. Word has length 19 [2021-06-05 14:45:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:04,309 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 278 transitions. [2021-06-05 14:45:04,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 278 transitions. [2021-06-05 14:45:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:04,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:04,310 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:04,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23481,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:04,510 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash -639992764, now seen corresponding path program 493 times [2021-06-05 14:45:04,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:04,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409568623] [2021-06-05 14:45:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:04,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:04,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409568623] [2021-06-05 14:45:04,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409568623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:04,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165227348] [2021-06-05 14:45:04,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:04,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:04,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165227348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:04,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:04,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:45:04,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345344845] [2021-06-05 14:45:04,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:04,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:04,976 INFO L87 Difference]: Start difference. First operand 129 states and 278 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:05,523 INFO L93 Difference]: Finished difference Result 208 states and 417 transitions. [2021-06-05 14:45:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:45:05,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:05,524 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:45:05,524 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 14:45:05,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:45:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 14:45:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 132. [2021-06-05 14:45:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2061068702290076) internal successors, (289), 131 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 289 transitions. [2021-06-05 14:45:05,526 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 289 transitions. Word has length 19 [2021-06-05 14:45:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:05,526 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 289 transitions. [2021-06-05 14:45:05,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 289 transitions. [2021-06-05 14:45:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:05,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:05,526 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:05,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23503 [2021-06-05 14:45:05,726 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:05,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1175222566, now seen corresponding path program 494 times [2021-06-05 14:45:05,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:05,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280844214] [2021-06-05 14:45:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:05,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280844214] [2021-06-05 14:45:05,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280844214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557990834] [2021-06-05 14:45:05,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:05,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:05,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:05,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:05,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:06,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557990834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:06,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:06,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:45:06,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490519558] [2021-06-05 14:45:06,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:06,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:06,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:06,079 INFO L87 Difference]: Start difference. First operand 132 states and 289 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:06,489 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2021-06-05 14:45:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:45:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:06,490 INFO L225 Difference]: With dead ends: 174 [2021-06-05 14:45:06,490 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 14:45:06,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 14:45:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2021-06-05 14:45:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2061068702290076) internal successors, (289), 131 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 289 transitions. [2021-06-05 14:45:06,491 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 289 transitions. Word has length 19 [2021-06-05 14:45:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:06,491 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 289 transitions. [2021-06-05 14:45:06,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,492 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 289 transitions. [2021-06-05 14:45:06,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:06,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:06,492 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:06,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23560,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:06,692 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1539943101, now seen corresponding path program 495 times [2021-06-05 14:45:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:06,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324775609] [2021-06-05 14:45:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:06,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:06,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324775609] [2021-06-05 14:45:06,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324775609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:06,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879628199] [2021-06-05 14:45:06,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:06,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:45:06,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:06,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:06,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879628199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:07,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:07,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:45:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267234532] [2021-06-05 14:45:07,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:07,190 INFO L87 Difference]: Start difference. First operand 132 states and 289 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:07,627 INFO L93 Difference]: Finished difference Result 171 states and 351 transitions. [2021-06-05 14:45:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:07,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:07,628 INFO L225 Difference]: With dead ends: 171 [2021-06-05 14:45:07,628 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:45:07,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 534.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:45:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 131. [2021-06-05 14:45:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 14:45:07,629 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 14:45:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:07,629 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 14:45:07,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 14:45:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:07,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:07,630 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:07,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23577 [2021-06-05 14:45:07,830 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash -587477244, now seen corresponding path program 496 times [2021-06-05 14:45:07,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:07,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578125423] [2021-06-05 14:45:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:07,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:07,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578125423] [2021-06-05 14:45:07,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578125423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:07,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719047189] [2021-06-05 14:45:07,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:08,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:08,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719047189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:08,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:08,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:45:08,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743141856] [2021-06-05 14:45:08,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:08,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:08,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:08,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:08,177 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:08,443 INFO L93 Difference]: Finished difference Result 161 states and 341 transitions. [2021-06-05 14:45:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:45:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:08,444 INFO L225 Difference]: With dead ends: 161 [2021-06-05 14:45:08,444 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 14:45:08,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 14:45:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 130. [2021-06-05 14:45:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-06-05 14:45:08,445 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 19 [2021-06-05 14:45:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:08,445 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-06-05 14:45:08,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-06-05 14:45:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:08,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:08,446 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:08,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23605 [2021-06-05 14:45:08,646 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:08,646 INFO L82 PathProgramCache]: Analyzing trace with hash 452758554, now seen corresponding path program 497 times [2021-06-05 14:45:08,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:08,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811650720] [2021-06-05 14:45:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:08,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:08,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811650720] [2021-06-05 14:45:08,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811650720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:08,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873404214] [2021-06-05 14:45:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:08,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:45:08,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:08,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:08,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873404214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:08,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:08,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:08,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462334341] [2021-06-05 14:45:08,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:08,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:08,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:08,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:08,950 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:09,143 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2021-06-05 14:45:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:45:09,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:09,144 INFO L225 Difference]: With dead ends: 152 [2021-06-05 14:45:09,144 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:45:09,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:45:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:45:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 126. [2021-06-05 14:45:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.16) internal successors, (270), 125 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 270 transitions. [2021-06-05 14:45:09,145 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 270 transitions. Word has length 19 [2021-06-05 14:45:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:09,145 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 270 transitions. [2021-06-05 14:45:09,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 270 transitions. [2021-06-05 14:45:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:09,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:09,146 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:09,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23622,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:09,346 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:09,346 INFO L82 PathProgramCache]: Analyzing trace with hash 413634243, now seen corresponding path program 498 times [2021-06-05 14:45:09,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:09,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731969276] [2021-06-05 14:45:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:09,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:09,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731969276] [2021-06-05 14:45:09,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731969276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:09,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43749253] [2021-06-05 14:45:09,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:09,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:09,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:09,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43749253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:09,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:09,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:09,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304286974] [2021-06-05 14:45:09,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:09,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:09,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:09,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:09,706 INFO L87 Difference]: Start difference. First operand 126 states and 270 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:09,916 INFO L93 Difference]: Finished difference Result 134 states and 280 transitions. [2021-06-05 14:45:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:09,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:09,916 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:45:09,916 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 14:45:09,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 14:45:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-06-05 14:45:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1557377049180326) internal successors, (263), 122 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 263 transitions. [2021-06-05 14:45:09,918 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 263 transitions. Word has length 19 [2021-06-05 14:45:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:09,918 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 263 transitions. [2021-06-05 14:45:09,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 263 transitions. [2021-06-05 14:45:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:09,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:09,918 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:10,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23626,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:10,118 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1781789199, now seen corresponding path program 499 times [2021-06-05 14:45:10,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:10,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563932594] [2021-06-05 14:45:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:10,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:10,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563932594] [2021-06-05 14:45:10,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563932594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:10,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875891557] [2021-06-05 14:45:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:10,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:10,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:10,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:10,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:10,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:10,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:45:10,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:10,461 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-06-05 14:45:10,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:10,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:10,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:10,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:45:10,468 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-06-05 14:45:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:10,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875891557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:10,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:10,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:10,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764371741] [2021-06-05 14:45:10,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:10,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:10,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:10,473 INFO L87 Difference]: Start difference. First operand 123 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:10,762 INFO L93 Difference]: Finished difference Result 166 states and 349 transitions. [2021-06-05 14:45:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:45:10,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:10,763 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:45:10,763 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:45:10,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:45:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2021-06-05 14:45:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1557377049180326) internal successors, (263), 122 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 263 transitions. [2021-06-05 14:45:10,764 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 263 transitions. Word has length 19 [2021-06-05 14:45:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:10,764 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 263 transitions. [2021-06-05 14:45:10,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 263 transitions. [2021-06-05 14:45:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:10,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:10,765 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:10,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23637 [2021-06-05 14:45:10,965 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1498663619, now seen corresponding path program 500 times [2021-06-05 14:45:10,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:10,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153834858] [2021-06-05 14:45:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:11,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:11,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153834858] [2021-06-05 14:45:11,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153834858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:11,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431557533] [2021-06-05 14:45:11,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:11,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:11,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:11,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:11,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:11,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:11,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:11,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:11,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:11,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:11,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:45:11,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:11,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:11,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:11,371 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-06-05 14:45:11,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:11,374 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:11,397 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-06-05 14:45:11,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:11,397 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-06-05 14:45:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:11,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431557533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:11,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:11,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:11,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874622155] [2021-06-05 14:45:11,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:11,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:11,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:11,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:11,420 INFO L87 Difference]: Start difference. First operand 123 states and 263 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:11,693 INFO L93 Difference]: Finished difference Result 179 states and 375 transitions. [2021-06-05 14:45:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:45:11,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:11,693 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:45:11,693 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:45:11,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:45:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 121. [2021-06-05 14:45:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-06-05 14:45:11,695 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 19 [2021-06-05 14:45:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:11,695 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-06-05 14:45:11,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-06-05 14:45:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:11,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:11,695 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:11,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23661,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:11,895 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash -509837967, now seen corresponding path program 501 times [2021-06-05 14:45:11,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:11,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138668497] [2021-06-05 14:45:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:11,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138668497] [2021-06-05 14:45:11,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138668497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687503559] [2021-06-05 14:45:11,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:12,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:12,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:12,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:12,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,326 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:45:12,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:12,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:12,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:12,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:12,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:12,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:12,430 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:12,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:12,459 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:12,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:12,487 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:12,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:12,514 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:12,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:12,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:12,538 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:45:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:12,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687503559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:12,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:12,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:12,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381761087] [2021-06-05 14:45:12,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:12,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:12,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:12,566 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:12,835 INFO L93 Difference]: Finished difference Result 166 states and 342 transitions. [2021-06-05 14:45:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:45:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:12,836 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:45:12,836 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:45:12,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:45:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 121. [2021-06-05 14:45:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-06-05 14:45:12,837 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 19 [2021-06-05 14:45:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:12,837 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-06-05 14:45:12,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-06-05 14:45:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:12,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:12,838 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:13,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23710 [2021-06-05 14:45:13,038 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1639071218, now seen corresponding path program 502 times [2021-06-05 14:45:13,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:13,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692904038] [2021-06-05 14:45:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:13,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:13,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692904038] [2021-06-05 14:45:13,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692904038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:13,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380208415] [2021-06-05 14:45:13,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:13,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:13,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:13,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:13,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:13,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380208415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:13,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:13,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:13,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845650535] [2021-06-05 14:45:13,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:13,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:13,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:13,477 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:13,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:13,945 INFO L93 Difference]: Finished difference Result 218 states and 438 transitions. [2021-06-05 14:45:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:45:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:13,946 INFO L225 Difference]: With dead ends: 218 [2021-06-05 14:45:13,946 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:45:13,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:45:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:45:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 122. [2021-06-05 14:45:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1818181818181817) internal successors, (264), 121 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 264 transitions. [2021-06-05 14:45:13,947 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 264 transitions. Word has length 19 [2021-06-05 14:45:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:13,947 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 264 transitions. [2021-06-05 14:45:13,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 264 transitions. [2021-06-05 14:45:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:13,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:13,947 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:14,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23731 [2021-06-05 14:45:14,148 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1103841416, now seen corresponding path program 503 times [2021-06-05 14:45:14,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:14,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124747368] [2021-06-05 14:45:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:14,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:14,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124747368] [2021-06-05 14:45:14,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124747368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:14,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360169577] [2021-06-05 14:45:14,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:14,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:45:14,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:14,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:14,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360169577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:14,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:14,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:14,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584777986] [2021-06-05 14:45:14,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:14,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:14,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:14,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:14,489 INFO L87 Difference]: Start difference. First operand 122 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:14,844 INFO L93 Difference]: Finished difference Result 158 states and 332 transitions. [2021-06-05 14:45:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:45:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:14,845 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:45:14,845 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 14:45:14,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:45:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 14:45:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2021-06-05 14:45:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1596638655462184) internal successors, (257), 119 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 257 transitions. [2021-06-05 14:45:14,846 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 257 transitions. Word has length 19 [2021-06-05 14:45:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:14,846 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 257 transitions. [2021-06-05 14:45:14,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 257 transitions. [2021-06-05 14:45:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:14,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:14,846 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:15,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23795 [2021-06-05 14:45:15,047 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 739120881, now seen corresponding path program 504 times [2021-06-05 14:45:15,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:15,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654673005] [2021-06-05 14:45:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:15,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:15,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654673005] [2021-06-05 14:45:15,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654673005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:15,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248554805] [2021-06-05 14:45:15,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:15,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:45:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:15,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248554805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:15,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:15,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:15,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383636336] [2021-06-05 14:45:15,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:15,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:15,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:15,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:15,447 INFO L87 Difference]: Start difference. First operand 120 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:15,698 INFO L93 Difference]: Finished difference Result 137 states and 287 transitions. [2021-06-05 14:45:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:15,699 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:45:15,699 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:45:15,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:45:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:45:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 118. [2021-06-05 14:45:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-06-05 14:45:15,700 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 19 [2021-06-05 14:45:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:15,700 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-06-05 14:45:15,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-06-05 14:45:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:15,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:15,701 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:15,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23812 [2021-06-05 14:45:15,901 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash 530397831, now seen corresponding path program 505 times [2021-06-05 14:45:15,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:15,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144032797] [2021-06-05 14:45:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:15,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:15,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144032797] [2021-06-05 14:45:15,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144032797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:15,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022430642] [2021-06-05 14:45:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:16,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:16,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:16,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:45:16,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:16,344 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-06-05 14:45:16,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:16,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:16,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:16,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:16,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:16,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:16,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:16,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:16,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:16,408 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-06-05 14:45:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:16,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022430642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:16,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:16,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:16,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601406163] [2021-06-05 14:45:16,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:16,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:16,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:16,437 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:16,789 INFO L93 Difference]: Finished difference Result 158 states and 325 transitions. [2021-06-05 14:45:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:45:16,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:16,790 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:45:16,790 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 14:45:16,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 14:45:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 118. [2021-06-05 14:45:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-06-05 14:45:16,791 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 19 [2021-06-05 14:45:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:16,791 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-06-05 14:45:16,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-06-05 14:45:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:16,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:16,791 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:16,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23840 [2021-06-05 14:45:16,992 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1615660280, now seen corresponding path program 506 times [2021-06-05 14:45:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:16,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322988538] [2021-06-05 14:45:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:17,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:17,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322988538] [2021-06-05 14:45:17,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322988538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:17,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520593156] [2021-06-05 14:45:17,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:17,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:17,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:17,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:17,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520593156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:17,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:17,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568318948] [2021-06-05 14:45:17,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:17,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:17,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:17,401 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:17,956 INFO L93 Difference]: Finished difference Result 211 states and 421 transitions. [2021-06-05 14:45:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:45:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:17,956 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:45:17,956 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:45:17,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:45:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:45:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 120. [2021-06-05 14:45:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 14:45:17,958 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 19 [2021-06-05 14:45:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:17,958 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 14:45:17,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 14:45:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:17,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:17,958 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:18,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23863 [2021-06-05 14:45:18,165 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2144077214, now seen corresponding path program 507 times [2021-06-05 14:45:18,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:18,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221581568] [2021-06-05 14:45:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:18,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:18,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221581568] [2021-06-05 14:45:18,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221581568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:18,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544092289] [2021-06-05 14:45:18,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:18,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:18,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:18,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:18,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544092289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:18,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:18,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293824918] [2021-06-05 14:45:18,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:18,519 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:18,882 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2021-06-05 14:45:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:45:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:18,882 INFO L225 Difference]: With dead ends: 168 [2021-06-05 14:45:18,882 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 14:45:18,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:45:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 14:45:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2021-06-05 14:45:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 14:45:18,887 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 19 [2021-06-05 14:45:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:18,887 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 14:45:18,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 14:45:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:18,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:18,888 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:19,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23907,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:19,088 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1779356679, now seen corresponding path program 508 times [2021-06-05 14:45:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:19,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480984543] [2021-06-05 14:45:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:19,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480984543] [2021-06-05 14:45:19,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480984543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331443589] [2021-06-05 14:45:19,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:19,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:19,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:19,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:19,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331443589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:19,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:19,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:19,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828551679] [2021-06-05 14:45:19,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:19,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:19,505 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:19,915 INFO L93 Difference]: Finished difference Result 159 states and 324 transitions. [2021-06-05 14:45:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:19,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:19,915 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:45:19,915 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:45:19,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:45:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 119. [2021-06-05 14:45:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-06-05 14:45:19,917 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 19 [2021-06-05 14:45:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:19,917 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-06-05 14:45:19,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-06-05 14:45:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:19,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:19,917 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:20,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23936 [2021-06-05 14:45:20,117 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1563144760, now seen corresponding path program 509 times [2021-06-05 14:45:20,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:20,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013937321] [2021-06-05 14:45:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:20,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:20,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013937321] [2021-06-05 14:45:20,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013937321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:20,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851571149] [2021-06-05 14:45:20,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:20,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:20,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:20,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:20,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:20,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851571149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:20,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:20,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:20,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523371609] [2021-06-05 14:45:20,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:20,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:20,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:20,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:20,441 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:20,668 INFO L93 Difference]: Finished difference Result 155 states and 324 transitions. [2021-06-05 14:45:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:45:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:20,668 INFO L225 Difference]: With dead ends: 155 [2021-06-05 14:45:20,668 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:45:20,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:45:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:45:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2021-06-05 14:45:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-05 14:45:20,669 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 19 [2021-06-05 14:45:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:20,669 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-05 14:45:20,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-05 14:45:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:20,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:20,670 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:20,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23957 [2021-06-05 14:45:20,870 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:20,870 INFO L82 PathProgramCache]: Analyzing trace with hash 766664147, now seen corresponding path program 510 times [2021-06-05 14:45:20,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:20,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325696039] [2021-06-05 14:45:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:20,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325696039] [2021-06-05 14:45:20,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325696039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008415296] [2021-06-05 14:45:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:21,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:21,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:21,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:21,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008415296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:21,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:21,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:21,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284962004] [2021-06-05 14:45:21,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:21,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:21,280 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:21,547 INFO L93 Difference]: Finished difference Result 133 states and 276 transitions. [2021-06-05 14:45:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:45:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:21,548 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:45:21,548 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:45:21,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:45:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:45:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-06-05 14:45:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1415929203539825) internal successors, (242), 113 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 242 transitions. [2021-06-05 14:45:21,549 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 242 transitions. Word has length 19 [2021-06-05 14:45:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:21,549 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 242 transitions. [2021-06-05 14:45:21,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 242 transitions. [2021-06-05 14:45:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:21,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:21,549 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:21,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23974,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:21,750 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1582030799, now seen corresponding path program 511 times [2021-06-05 14:45:21,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:21,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204049642] [2021-06-05 14:45:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:21,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:21,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204049642] [2021-06-05 14:45:21,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204049642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:21,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326506777] [2021-06-05 14:45:21,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:22,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:22,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:22,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,274 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:45:22,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:22,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:22,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:22,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:22,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:22,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:22,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:22,375 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:22,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:22,405 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:22,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:22,433 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:22,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:22,460 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:22,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:22,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:22,484 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:45:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:22,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326506777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:22,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:22,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:22,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939299003] [2021-06-05 14:45:22,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:22,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:22,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:22,514 INFO L87 Difference]: Start difference. First operand 114 states and 242 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:22,903 INFO L93 Difference]: Finished difference Result 148 states and 294 transitions. [2021-06-05 14:45:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:22,904 INFO L225 Difference]: With dead ends: 148 [2021-06-05 14:45:22,904 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 14:45:22,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 14:45:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2021-06-05 14:45:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-06-05 14:45:22,905 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 19 [2021-06-05 14:45:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:22,905 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-06-05 14:45:22,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-06-05 14:45:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:22,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:22,905 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:23,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23995 [2021-06-05 14:45:23,106 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash 566878386, now seen corresponding path program 512 times [2021-06-05 14:45:23,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:23,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566672243] [2021-06-05 14:45:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:23,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:23,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566672243] [2021-06-05 14:45:23,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566672243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:23,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478717009] [2021-06-05 14:45:23,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:23,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:23,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:23,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478717009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:23,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:23,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:23,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393077492] [2021-06-05 14:45:23,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:23,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:23,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:23,496 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:23,904 INFO L93 Difference]: Finished difference Result 172 states and 331 transitions. [2021-06-05 14:45:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:45:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:23,904 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:45:23,904 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:45:23,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:45:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2021-06-05 14:45:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 14:45:23,905 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 14:45:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:23,906 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 14:45:23,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 14:45:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:23,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:23,906 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:24,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24016 [2021-06-05 14:45:24,106 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash 31648584, now seen corresponding path program 513 times [2021-06-05 14:45:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:24,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103393103] [2021-06-05 14:45:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:24,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:24,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103393103] [2021-06-05 14:45:24,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103393103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:24,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989532242] [2021-06-05 14:45:24,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:24,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:24,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989532242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:24,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:24,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:24,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179800675] [2021-06-05 14:45:24,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:24,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:24,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:24,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:24,391 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:24,553 INFO L93 Difference]: Finished difference Result 137 states and 279 transitions. [2021-06-05 14:45:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:45:24,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:24,553 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:45:24,553 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 14:45:24,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 14:45:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-06-05 14:45:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 14:45:24,555 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 14:45:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:24,555 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 14:45:24,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 14:45:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:24,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:24,555 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:24,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24052,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:24,755 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:24,756 INFO L82 PathProgramCache]: Analyzing trace with hash -333071951, now seen corresponding path program 514 times [2021-06-05 14:45:24,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:24,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839789984] [2021-06-05 14:45:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:24,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:24,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839789984] [2021-06-05 14:45:24,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839789984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:24,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892496747] [2021-06-05 14:45:24,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:24,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:25,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892496747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:25,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:25,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896848702] [2021-06-05 14:45:25,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:25,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:25,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:25,173 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:25,522 INFO L93 Difference]: Finished difference Result 149 states and 294 transitions. [2021-06-05 14:45:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:25,523 INFO L225 Difference]: With dead ends: 149 [2021-06-05 14:45:25,523 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:45:25,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:45:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:45:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 112. [2021-06-05 14:45:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 14:45:25,524 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 14:45:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:25,524 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 14:45:25,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 14:45:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:25,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:25,524 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:25,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24056,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:25,725 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash 619393906, now seen corresponding path program 515 times [2021-06-05 14:45:25,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:25,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599164676] [2021-06-05 14:45:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:25,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:25,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599164676] [2021-06-05 14:45:25,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599164676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:25,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575663979] [2021-06-05 14:45:25,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:25,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:25,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:25,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:26,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575663979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:26,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:26,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:26,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727053261] [2021-06-05 14:45:26,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:26,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:26,010 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:26,186 INFO L93 Difference]: Finished difference Result 138 states and 282 transitions. [2021-06-05 14:45:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:45:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:26,186 INFO L225 Difference]: With dead ends: 138 [2021-06-05 14:45:26,187 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 14:45:26,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 14:45:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-05 14:45:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 14:45:26,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 14:45:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:26,188 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 14:45:26,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 14:45:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:26,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:26,188 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:26,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24075,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:26,388 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1345764483, now seen corresponding path program 516 times [2021-06-05 14:45:26,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:26,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195226149] [2021-06-05 14:45:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:26,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:26,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195226149] [2021-06-05 14:45:26,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195226149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:26,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069942855] [2021-06-05 14:45:26,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:26,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:26,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:26,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:26,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069942855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:26,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:26,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:26,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192305541] [2021-06-05 14:45:26,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:26,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:26,822 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:27,107 INFO L93 Difference]: Finished difference Result 144 states and 282 transitions. [2021-06-05 14:45:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:45:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:27,108 INFO L225 Difference]: With dead ends: 144 [2021-06-05 14:45:27,108 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 14:45:27,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:45:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 14:45:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2021-06-05 14:45:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 14:45:27,109 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 14:45:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:27,109 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 14:45:27,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 14:45:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:27,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:27,109 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:27,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24079,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:27,310 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:27,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1659629704, now seen corresponding path program 517 times [2021-06-05 14:45:27,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:27,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680675934] [2021-06-05 14:45:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:27,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:27,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680675934] [2021-06-05 14:45:27,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680675934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:27,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310361396] [2021-06-05 14:45:27,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:27,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310361396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:27,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:27,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 14:45:27,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854666800] [2021-06-05 14:45:27,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:45:27,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:45:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:45:27,561 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:27,728 INFO L93 Difference]: Finished difference Result 133 states and 269 transitions. [2021-06-05 14:45:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:45:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:27,729 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:45:27,729 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:45:27,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:45:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:45:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 107. [2021-06-05 14:45:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.056603773584906) internal successors, (218), 106 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 218 transitions. [2021-06-05 14:45:27,730 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 218 transitions. Word has length 19 [2021-06-05 14:45:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:27,730 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 218 transitions. [2021-06-05 14:45:27,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 218 transitions. [2021-06-05 14:45:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:27,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:27,730 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:27,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24099,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:27,931 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:27,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1620505393, now seen corresponding path program 518 times [2021-06-05 14:45:27,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:27,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391209754] [2021-06-05 14:45:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:28,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:28,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391209754] [2021-06-05 14:45:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391209754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:28,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123708464] [2021-06-05 14:45:28,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:28,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:28,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:28,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123708464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:28,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:28,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:28,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063065774] [2021-06-05 14:45:28,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:28,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:28,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:28,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:28,274 INFO L87 Difference]: Start difference. First operand 107 states and 218 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:28,442 INFO L93 Difference]: Finished difference Result 115 states and 228 transitions. [2021-06-05 14:45:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:28,443 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:45:28,443 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:45:28,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:45:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:45:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-06-05 14:45:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 14:45:28,444 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 14:45:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:28,444 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 14:45:28,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 14:45:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:28,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:28,444 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:28,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24103 [2021-06-05 14:45:28,644 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash -470873217, now seen corresponding path program 519 times [2021-06-05 14:45:28,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:28,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778276668] [2021-06-05 14:45:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:28,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778276668] [2021-06-05 14:45:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778276668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290843705] [2021-06-05 14:45:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:28,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:28,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:28,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:29,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:29,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:29,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,219 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-06-05 14:45:29,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:29,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:29,257 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:29,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:29,320 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:29,349 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:29,378 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:29,404 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:29,428 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-06-05 14:45:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:29,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290843705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:29,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:29,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:29,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553085926] [2021-06-05 14:45:29,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:29,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:29,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:29,459 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:29,782 INFO L93 Difference]: Finished difference Result 140 states and 271 transitions. [2021-06-05 14:45:29,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:45:29,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:29,782 INFO L225 Difference]: With dead ends: 140 [2021-06-05 14:45:29,782 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 14:45:29,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:45:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 14:45:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 106. [2021-06-05 14:45:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 14:45:29,783 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 14:45:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:29,784 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 14:45:29,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 14:45:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:29,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:29,784 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:29,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24114 [2021-06-05 14:45:29,984 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash -918210940, now seen corresponding path program 520 times [2021-06-05 14:45:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:29,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042874897] [2021-06-05 14:45:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:30,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042874897] [2021-06-05 14:45:30,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042874897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467499837] [2021-06-05 14:45:30,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:30,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:30,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:30,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467499837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:30,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:30,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:30,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446689020] [2021-06-05 14:45:30,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:30,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:30,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:30,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:30,279 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:30,619 INFO L93 Difference]: Finished difference Result 165 states and 314 transitions. [2021-06-05 14:45:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:30,619 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:45:30,619 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:45:30,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:45:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 109. [2021-06-05 14:45:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 14:45:30,624 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-06-05 14:45:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:30,624 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 14:45:30,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 14:45:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:30,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:30,624 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:30,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24137 [2021-06-05 14:45:30,825 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:30,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1453440742, now seen corresponding path program 521 times [2021-06-05 14:45:30,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:30,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931227970] [2021-06-05 14:45:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:30,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931227970] [2021-06-05 14:45:30,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931227970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875893549] [2021-06-05 14:45:30,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:31,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:45:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:31,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875893549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:31,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:31,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:31,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041637829] [2021-06-05 14:45:31,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:31,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:31,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:31,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:31,123 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:31,315 INFO L93 Difference]: Finished difference Result 130 states and 262 transitions. [2021-06-05 14:45:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:45:31,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:31,315 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:45:31,315 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:45:31,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:45:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-06-05 14:45:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 14:45:31,316 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-06-05 14:45:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:31,317 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 14:45:31,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 14:45:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:31,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:31,317 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:31,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24148 [2021-06-05 14:45:31,517 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1818161277, now seen corresponding path program 522 times [2021-06-05 14:45:31,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:31,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378685198] [2021-06-05 14:45:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:31,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:31,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378685198] [2021-06-05 14:45:31,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378685198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:31,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617003023] [2021-06-05 14:45:31,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:31,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:32,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617003023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:32,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:32,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:32,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364136491] [2021-06-05 14:45:32,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:32,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:32,037 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:32,365 INFO L93 Difference]: Finished difference Result 149 states and 290 transitions. [2021-06-05 14:45:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:45:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:32,365 INFO L225 Difference]: With dead ends: 149 [2021-06-05 14:45:32,365 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:45:32,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:45:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:45:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 108. [2021-06-05 14:45:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 14:45:32,367 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 14:45:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:32,367 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 14:45:32,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 14:45:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:32,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:32,367 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:32,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24152,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:32,567 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash -865695420, now seen corresponding path program 523 times [2021-06-05 14:45:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:32,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729508047] [2021-06-05 14:45:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:32,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:32,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729508047] [2021-06-05 14:45:32,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729508047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:32,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233385679] [2021-06-05 14:45:32,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:32,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233385679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:32,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:32,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:32,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264182324] [2021-06-05 14:45:32,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:32,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:32,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:32,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:32,854 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:33,001 INFO L93 Difference]: Finished difference Result 131 states and 265 transitions. [2021-06-05 14:45:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:45:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:33,001 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:45:33,001 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:45:33,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:45:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2021-06-05 14:45:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 14:45:33,002 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 14:45:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:33,003 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 14:45:33,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 14:45:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:33,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:33,003 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:33,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24174,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:33,203 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1464113487, now seen corresponding path program 524 times [2021-06-05 14:45:33,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:33,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472182135] [2021-06-05 14:45:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:33,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:33,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472182135] [2021-06-05 14:45:33,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472182135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:33,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737076168] [2021-06-05 14:45:33,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:33,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:33,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:33,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:33,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:33,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737076168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:33,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:33,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:45:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043115364] [2021-06-05 14:45:33,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:33,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:33,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:33,713 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:34,036 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-06-05 14:45:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:45:34,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:34,036 INFO L225 Difference]: With dead ends: 143 [2021-06-05 14:45:34,036 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 14:45:34,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:45:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 14:45:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2021-06-05 14:45:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 14:45:34,038 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 14:45:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:34,038 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 14:45:34,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 14:45:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:34,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:34,038 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:34,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24178,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:34,253 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 174540378, now seen corresponding path program 525 times [2021-06-05 14:45:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915255271] [2021-06-05 14:45:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:34,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:34,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915255271] [2021-06-05 14:45:34,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915255271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:34,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756546298] [2021-06-05 14:45:34,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:34,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:34,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:34,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756546298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:34,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:34,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:45:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070111517] [2021-06-05 14:45:34,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:45:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:45:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:45:34,521 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:34,686 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-06-05 14:45:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:45:34,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:34,686 INFO L225 Difference]: With dead ends: 132 [2021-06-05 14:45:34,686 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 14:45:34,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 14:45:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-06-05 14:45:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 14:45:34,687 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 14:45:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:34,687 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 14:45:34,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 14:45:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:34,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:34,688 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:34,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24199 [2021-06-05 14:45:34,888 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 135416067, now seen corresponding path program 526 times [2021-06-05 14:45:34,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:34,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683787434] [2021-06-05 14:45:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:34,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:34,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683787434] [2021-06-05 14:45:34,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683787434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:34,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445992173] [2021-06-05 14:45:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:35,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:35,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:35,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445992173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:35,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:35,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:45:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324545674] [2021-06-05 14:45:35,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:35,272 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:35,579 INFO L93 Difference]: Finished difference Result 137 states and 262 transitions. [2021-06-05 14:45:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:45:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:35,579 INFO L225 Difference]: With dead ends: 137 [2021-06-05 14:45:35,579 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:45:35,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:45:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 106. [2021-06-05 14:45:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-06-05 14:45:35,580 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-06-05 14:45:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:35,581 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-06-05 14:45:35,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-06-05 14:45:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:35,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:35,581 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:35,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24203 [2021-06-05 14:45:35,781 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1512107592, now seen corresponding path program 527 times [2021-06-05 14:45:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:35,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393455212] [2021-06-05 14:45:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:35,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:35,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393455212] [2021-06-05 14:45:35,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393455212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:35,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146046133] [2021-06-05 14:45:35,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:35,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:45:35,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:36,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146046133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:36,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:36,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 14:45:36,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87703407] [2021-06-05 14:45:36,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:45:36,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:45:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:45:36,041 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:36,207 INFO L93 Difference]: Finished difference Result 148 states and 284 transitions. [2021-06-05 14:45:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:45:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:36,208 INFO L225 Difference]: With dead ends: 148 [2021-06-05 14:45:36,208 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 14:45:36,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:45:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 14:45:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2021-06-05 14:45:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 201 transitions. [2021-06-05 14:45:36,209 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 201 transitions. Word has length 19 [2021-06-05 14:45:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:36,209 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 201 transitions. [2021-06-05 14:45:36,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 201 transitions. [2021-06-05 14:45:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:45:36,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:36,209 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:36,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24214 [2021-06-05 14:45:36,410 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:36,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1050497555, now seen corresponding path program 528 times [2021-06-05 14:45:36,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:36,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39098751] [2021-06-05 14:45:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:36,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:36,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39098751] [2021-06-05 14:45:36,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39098751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:36,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611706506] [2021-06-05 14:45:36,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:36,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:36,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:45:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:36,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611706506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:36,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:36,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:45:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278247177] [2021-06-05 14:45:36,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:45:36,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:45:36,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:45:36,733 INFO L87 Difference]: Start difference. First operand 100 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:37,051 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 14:45:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:37,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:45:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:37,051 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:45:37,051 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:45:37,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:45:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-06-05 14:45:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 99 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 200 transitions. [2021-06-05 14:45:37,052 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 200 transitions. Word has length 19 [2021-06-05 14:45:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:37,052 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 200 transitions. [2021-06-05 14:45:37,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 200 transitions. [2021-06-05 14:45:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:37,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:37,052 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:37,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24218,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:37,253 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 40501395, now seen corresponding path program 529 times [2021-06-05 14:45:37,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:37,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833038179] [2021-06-05 14:45:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:37,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833038179] [2021-06-05 14:45:37,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833038179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954115635] [2021-06-05 14:45:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:38,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:38,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:38,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:38,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:38,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:38,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:38,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:38,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:38,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:38,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:45:38,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:38,244 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-06-05 14:45:38,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:38,246 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:38,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:38,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:38,273 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:38,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:38,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:38,294 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:38,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:38,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:38,311 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:45:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:38,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954115635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:38,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:38,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 14:45:38,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645532367] [2021-06-05 14:45:38,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:45:38,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:45:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:45:38,389 INFO L87 Difference]: Start difference. First operand 100 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:39,052 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 14:45:39,535 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 14:45:39,882 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 14:45:40,012 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 14:45:40,372 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 14:45:40,502 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 14:45:40,782 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 14:45:40,929 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-06-05 14:45:41,068 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 14:45:41,197 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 14:45:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:41,344 INFO L93 Difference]: Finished difference Result 231 states and 463 transitions. [2021-06-05 14:45:41,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:45:41,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:41,345 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:45:41,345 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:45:41,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 3000.2ms TimeCoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:45:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:45:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 106. [2021-06-05 14:45:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 14:45:41,346 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 20 [2021-06-05 14:45:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:41,346 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 14:45:41,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 14:45:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:41,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:41,347 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:41,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24228,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:41,561 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1637276287, now seen corresponding path program 530 times [2021-06-05 14:45:41,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:41,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360550209] [2021-06-05 14:45:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:41,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:41,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360550209] [2021-06-05 14:45:41,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360550209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:41,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133383344] [2021-06-05 14:45:41,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:41,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:41,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:42,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:42,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:45:42,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:42,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:42,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:42,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:42,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:42,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:42,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:42,536 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 14:45:42,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:42,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:42,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:42,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:42,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:42,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:42,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:42,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:42,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:42,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:42,599 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:45:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133383344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:42,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:42,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:45:42,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203699744] [2021-06-05 14:45:42,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:42,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:42,676 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:43,330 INFO L93 Difference]: Finished difference Result 164 states and 325 transitions. [2021-06-05 14:45:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:45:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:43,331 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:45:43,331 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 14:45:43,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 710.3ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:45:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 14:45:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2021-06-05 14:45:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-05 14:45:43,332 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 20 [2021-06-05 14:45:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:43,332 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-05 14:45:43,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-05 14:45:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:43,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:43,332 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:43,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24319,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:43,533 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash 759200197, now seen corresponding path program 531 times [2021-06-05 14:45:43,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:43,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686459196] [2021-06-05 14:45:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:43,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686459196] [2021-06-05 14:45:43,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686459196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522154825] [2021-06-05 14:45:43,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:43,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:45:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:44,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:44,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:44,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:45:44,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:44,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:44,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:44,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:44,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:44,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:44,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:44,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:44,457 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-06-05 14:45:44,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:44,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:44,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:44,484 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:44,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:44,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:44,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:44,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:44,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:44,523 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:45:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:44,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522154825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:44,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:44,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:45:44,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693218159] [2021-06-05 14:45:44,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:44,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:44,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:44,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:44,601 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:44,899 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 14:45:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:44,964 INFO L93 Difference]: Finished difference Result 149 states and 289 transitions. [2021-06-05 14:45:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:45:44,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:44,964 INFO L225 Difference]: With dead ends: 149 [2021-06-05 14:45:44,964 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:45:44,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 643.5ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:45:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:45:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-06-05 14:45:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 221 transitions. [2021-06-05 14:45:44,966 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 221 transitions. Word has length 20 [2021-06-05 14:45:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:44,966 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 221 transitions. [2021-06-05 14:45:44,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 221 transitions. [2021-06-05 14:45:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:44,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:44,966 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:45,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24411 [2021-06-05 14:45:45,166 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash -271872767, now seen corresponding path program 532 times [2021-06-05 14:45:45,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:45,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810281091] [2021-06-05 14:45:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:45,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:45,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810281091] [2021-06-05 14:45:45,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810281091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:45,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829541721] [2021-06-05 14:45:45,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:45,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:45,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:45,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:46,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:46,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:46,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:46,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:45:46,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:46,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:46,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,189 INFO L628 ElimStorePlain]: treesize reduction 106, result has 36.1 percent of original size [2021-06-05 14:45:46,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:46,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:46,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:46,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:46,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:46,234 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:46,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:46,253 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:45:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829541721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:46,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:46,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:45:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069390873] [2021-06-05 14:45:46,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:46,333 INFO L87 Difference]: Start difference. First operand 109 states and 221 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:46,901 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:45:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:46,960 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-06-05 14:45:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:45:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:46,961 INFO L225 Difference]: With dead ends: 161 [2021-06-05 14:45:46,961 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:45:46,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:45:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2021-06-05 14:45:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-06-05 14:45:46,962 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 20 [2021-06-05 14:45:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:46,962 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-06-05 14:45:46,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-06-05 14:45:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:46,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:46,963 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:47,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24501 [2021-06-05 14:45:47,163 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2050171461, now seen corresponding path program 533 times [2021-06-05 14:45:47,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:47,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872466713] [2021-06-05 14:45:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:47,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:47,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872466713] [2021-06-05 14:45:47,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872466713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:47,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457477067] [2021-06-05 14:45:47,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:47,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:47,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:48,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:48,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:48,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:48,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:48,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:48,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:45:48,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:48,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:48,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:48,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,265 INFO L628 ElimStorePlain]: treesize reduction 141, result has 30.2 percent of original size [2021-06-05 14:45:48,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:48,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:48,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:48,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:48,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:48,312 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:48,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:48,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:48,330 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-06-05 14:45:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:48,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457477067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:48,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:48,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:45:48,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460887188] [2021-06-05 14:45:48,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:48,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:48,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:48,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:48,411 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:48,554 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2021-06-05 14:45:48,715 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-06-05 14:45:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:49,134 INFO L93 Difference]: Finished difference Result 162 states and 317 transitions. [2021-06-05 14:45:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:49,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:49,135 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:45:49,135 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:45:49,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 995.3ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:45:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-06-05 14:45:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 14:45:49,136 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 20 [2021-06-05 14:45:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:49,136 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 14:45:49,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 14:45:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:49,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:49,136 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:49,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24621 [2021-06-05 14:45:49,337 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1570886785, now seen corresponding path program 534 times [2021-06-05 14:45:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:49,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004476534] [2021-06-05 14:45:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:49,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:49,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004476534] [2021-06-05 14:45:49,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004476534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:49,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76331784] [2021-06-05 14:45:49,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:49,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:45:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:49,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:49,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:50,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:50,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:50,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:50,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:50,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:50,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:50,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:50,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:50,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:45:50,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:50,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:50,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:50,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:50,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:50,943 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2021-06-05 14:45:50,944 INFO L628 ElimStorePlain]: treesize reduction 480, result has 19.3 percent of original size [2021-06-05 14:45:50,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:50,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:50,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:50,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:50,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:51,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:51,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:45:51,037 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:51,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:51,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:51,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:51,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:51,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:51,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:51,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:51,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:51,161 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:51,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:51,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:51,199 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:51,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:51,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:45:51,234 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:777, output treesize:73 [2021-06-05 14:45:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:51,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76331784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:51,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:51,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:45:51,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808728614] [2021-06-05 14:45:51,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:51,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:51,371 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:51,519 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2021-06-05 14:45:51,698 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 14:45:52,391 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 14:45:52,575 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-06-05 14:45:52,697 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2021-06-05 14:45:52,860 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-06-05 14:45:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:53,317 INFO L93 Difference]: Finished difference Result 272 states and 518 transitions. [2021-06-05 14:45:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:45:53,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:53,317 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:45:53,318 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:45:53,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2086.6ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:45:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:45:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 115. [2021-06-05 14:45:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 14:45:53,319 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 20 [2021-06-05 14:45:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:53,319 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 14:45:53,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 14:45:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:53,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:53,319 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:53,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24778 [2021-06-05 14:45:53,520 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1353228433, now seen corresponding path program 535 times [2021-06-05 14:45:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:53,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439305883] [2021-06-05 14:45:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:53,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:53,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439305883] [2021-06-05 14:45:53,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439305883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:53,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472396842] [2021-06-05 14:45:53,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:53,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:54,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:54,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:45:54,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:54,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:54,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:54,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:54,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:54,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:54,595 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:45:54,600 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:54,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:54,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:45:54,609 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:54,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,665 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:45:54,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:54,669 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:54,677 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:54,681 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:54,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:54,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:54,702 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:45:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:54,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472396842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:54,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:54,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:45:54,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241784490] [2021-06-05 14:45:54,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:54,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:54,781 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:55,216 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 14:45:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:55,398 INFO L93 Difference]: Finished difference Result 170 states and 345 transitions. [2021-06-05 14:45:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:45:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:55,398 INFO L225 Difference]: With dead ends: 170 [2021-06-05 14:45:55,398 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:45:55,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 768.9ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:45:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2021-06-05 14:45:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-06-05 14:45:55,400 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 20 [2021-06-05 14:45:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:55,400 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-06-05 14:45:55,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-06-05 14:45:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:55,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:55,400 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:55,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24954 [2021-06-05 14:45:55,600 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1910665899, now seen corresponding path program 536 times [2021-06-05 14:45:55,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:55,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863092000] [2021-06-05 14:45:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:55,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:55,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863092000] [2021-06-05 14:45:55,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863092000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:55,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47158319] [2021-06-05 14:45:55,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:55,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:55,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:55,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:56,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:45:56,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:56,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:56,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:45:56,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,760 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,764 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:45:56,768 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,772 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:45:56,777 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:56,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:56,781 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:56,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,837 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:45:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:56,840 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:56,843 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:56,846 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:56,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:56,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:56,868 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:45:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:56,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47158319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:56,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:56,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:45:56,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211146212] [2021-06-05 14:45:56,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:56,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:56,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:56,951 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:57,370 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:45:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:57,501 INFO L93 Difference]: Finished difference Result 167 states and 339 transitions. [2021-06-05 14:45:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:45:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:57,502 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:45:57,502 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:45:57,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 800.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:45:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2021-06-05 14:45:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.094017094017094) internal successors, (245), 117 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 245 transitions. [2021-06-05 14:45:57,503 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 245 transitions. Word has length 20 [2021-06-05 14:45:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:57,503 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 245 transitions. [2021-06-05 14:45:57,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 245 transitions. [2021-06-05 14:45:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:57,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:57,503 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:57,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25128 [2021-06-05 14:45:57,704 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash -62257169, now seen corresponding path program 537 times [2021-06-05 14:45:57,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:57,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904184048] [2021-06-05 14:45:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:57,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:57,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904184048] [2021-06-05 14:45:57,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904184048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:57,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099086945] [2021-06-05 14:45:57,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:58,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:45:58,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:45:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:58,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:58,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:58,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:45:58,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:58,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:45:58,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:45:58,796 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,803 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,807 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,810 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,811 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,822 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:58,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:45:58,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,829 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:58,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,886 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:45:58,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:45:58,889 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:45:58,892 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:45:58,895 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:58,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:58,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:58,917 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:579, output treesize:52 [2021-06-05 14:45:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:58,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099086945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:58,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:58,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:45:58,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349022632] [2021-06-05 14:45:59,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:59,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:59,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:59,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:59,000 INFO L87 Difference]: Start difference. First operand 118 states and 245 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:59,446 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:45:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:59,548 INFO L93 Difference]: Finished difference Result 164 states and 333 transitions. [2021-06-05 14:45:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:45:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:59,548 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:45:59,548 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:45:59,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:45:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2021-06-05 14:45:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.093220338983051) internal successors, (247), 118 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 247 transitions. [2021-06-05 14:45:59,550 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 247 transitions. Word has length 20 [2021-06-05 14:45:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:59,550 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 247 transitions. [2021-06-05 14:45:59,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 247 transitions. [2021-06-05 14:45:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:45:59,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:59,550 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:59,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25344 [2021-06-05 14:45:59,750 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:59,751 INFO L82 PathProgramCache]: Analyzing trace with hash -541541845, now seen corresponding path program 538 times [2021-06-05 14:45:59,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:59,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803302076] [2021-06-05 14:45:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:59,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:59,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803302076] [2021-06-05 14:45:59,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803302076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:59,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337186498] [2021-06-05 14:45:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:00,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:00,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:00,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:00,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:00,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:00,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:00,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:00,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:00,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:00,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:00,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:00,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:00,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:00,975 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:00,979 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:00,985 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:00,988 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:00,993 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:00,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:46:00,997 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:01,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:01,001 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:01,096 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:46:01,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:01,100 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:01,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:01,104 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:01,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:01,107 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:01,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:01,111 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:01,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:01,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:01,151 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:46:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337186498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:01,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:01,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:01,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923102675] [2021-06-05 14:46:01,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:01,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:01,299 INFO L87 Difference]: Start difference. First operand 119 states and 247 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:01,939 INFO L93 Difference]: Finished difference Result 182 states and 357 transitions. [2021-06-05 14:46:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:46:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:01,940 INFO L225 Difference]: With dead ends: 182 [2021-06-05 14:46:01,940 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 14:46:01,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 763.2ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:46:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 14:46:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 121. [2021-06-05 14:46:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 120 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 253 transitions. [2021-06-05 14:46:01,941 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 253 transitions. Word has length 20 [2021-06-05 14:46:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:01,941 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 253 transitions. [2021-06-05 14:46:01,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 253 transitions. [2021-06-05 14:46:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:01,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:01,942 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:02,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25487,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:02,142 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1344065599, now seen corresponding path program 539 times [2021-06-05 14:46:02,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:02,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842949523] [2021-06-05 14:46:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:02,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:02,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842949523] [2021-06-05 14:46:02,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842949523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:02,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602909703] [2021-06-05 14:46:02,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:02,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:46:02,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:02,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:02,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:03,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:03,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:03,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:03,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:03,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:03,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:03,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:03,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:03,170 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:03,174 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:03,179 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:03,183 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:03,186 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,246 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:46:03,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:03,250 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:03,253 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:03,256 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:03,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:03,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:03,287 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:46:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:03,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602909703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:03,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:03,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:03,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161303974] [2021-06-05 14:46:03,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:03,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:03,397 INFO L87 Difference]: Start difference. First operand 121 states and 253 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:03,678 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:46:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:03,726 INFO L93 Difference]: Finished difference Result 166 states and 334 transitions. [2021-06-05 14:46:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:46:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:03,726 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:46:03,726 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:46:03,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:46:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2021-06-05 14:46:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 122 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 257 transitions. [2021-06-05 14:46:03,728 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 257 transitions. Word has length 20 [2021-06-05 14:46:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:03,728 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 257 transitions. [2021-06-05 14:46:03,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 257 transitions. [2021-06-05 14:46:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:03,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:03,728 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:03,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25745,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:03,931 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:03,932 INFO L82 PathProgramCache]: Analyzing trace with hash 977978629, now seen corresponding path program 540 times [2021-06-05 14:46:03,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:03,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579647500] [2021-06-05 14:46:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:04,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579647500] [2021-06-05 14:46:04,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579647500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865752329] [2021-06-05 14:46:04,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:04,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:46:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:04,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:04,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:04,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:04,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:04,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:04,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:04,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:04,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:04,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:04,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:04,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:04,939 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:04,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:04,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:04,943 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:05,004 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:46:05,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:05,007 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:05,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:05,011 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:05,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:05,014 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:05,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:05,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:05,040 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:46:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:05,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865752329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:05,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:05,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107635541] [2021-06-05 14:46:05,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:05,150 INFO L87 Difference]: Start difference. First operand 123 states and 257 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,504 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:46:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:05,586 INFO L93 Difference]: Finished difference Result 169 states and 345 transitions. [2021-06-05 14:46:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:46:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:05,587 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:46:05,587 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:46:05,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 700.6ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:46:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2021-06-05 14:46:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-06-05 14:46:05,588 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 20 [2021-06-05 14:46:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:05,588 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-06-05 14:46:05,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-06-05 14:46:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:05,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:05,589 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:05,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25850,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:05,789 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash 498693953, now seen corresponding path program 541 times [2021-06-05 14:46:05,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:05,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939131557] [2021-06-05 14:46:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:05,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:05,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939131557] [2021-06-05 14:46:05,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939131557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:05,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580858686] [2021-06-05 14:46:05,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:06,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:06,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:46:06,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,825 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:06,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:06,841 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,846 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:06,852 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:06,861 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,866 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:06,871 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,875 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:06,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:06,880 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:06,884 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,989 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 14:46:06,989 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:46:06,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:06,993 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:06,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:06,997 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:07,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:07,001 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:07,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:07,004 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:07,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:07,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:07,049 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:46:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:07,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580858686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:07,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:07,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175426866] [2021-06-05 14:46:07,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:07,229 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:08,223 INFO L93 Difference]: Finished difference Result 234 states and 460 transitions. [2021-06-05 14:46:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:46:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:08,223 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:46:08,223 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 14:46:08,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1119.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:46:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 14:46:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2021-06-05 14:46:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 124 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 261 transitions. [2021-06-05 14:46:08,225 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 261 transitions. Word has length 20 [2021-06-05 14:46:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:08,225 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 261 transitions. [2021-06-05 14:46:08,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 261 transitions. [2021-06-05 14:46:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:08,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:08,225 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:08,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25992,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:08,426 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:08,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1565723951, now seen corresponding path program 542 times [2021-06-05 14:46:08,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:08,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667266213] [2021-06-05 14:46:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:08,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:08,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667266213] [2021-06-05 14:46:08,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667266213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:08,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536902927] [2021-06-05 14:46:08,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:08,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:08,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:08,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:08,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:08,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:08,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:08,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:08,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:08,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:08,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:08,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:08,951 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:08,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:08,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:08,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:08,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:08,977 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:46:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:09,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536902927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:09,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:09,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:46:09,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657128869] [2021-06-05 14:46:09,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:09,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:09,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:09,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:09,052 INFO L87 Difference]: Start difference. First operand 125 states and 261 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:09,407 INFO L93 Difference]: Finished difference Result 172 states and 351 transitions. [2021-06-05 14:46:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:46:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:09,407 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:46:09,407 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 14:46:09,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:46:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 14:46:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2021-06-05 14:46:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1031746031746033) internal successors, (265), 126 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 265 transitions. [2021-06-05 14:46:09,409 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 265 transitions. Word has length 20 [2021-06-05 14:46:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:09,409 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 265 transitions. [2021-06-05 14:46:09,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 265 transitions. [2021-06-05 14:46:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:09,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:09,409 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:09,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26129 [2021-06-05 14:46:09,610 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1086439275, now seen corresponding path program 543 times [2021-06-05 14:46:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907279533] [2021-06-05 14:46:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:09,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907279533] [2021-06-05 14:46:09,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907279533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:09,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507214951] [2021-06-05 14:46:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:09,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:46:09,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:09,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:10,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:10,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:10,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:10,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:10,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:10,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:10,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:10,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:10,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:10,216 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:10,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:10,255 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:46:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:10,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507214951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:10,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:10,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:46:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654415138] [2021-06-05 14:46:10,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:10,392 INFO L87 Difference]: Start difference. First operand 127 states and 265 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:10,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:10,921 INFO L93 Difference]: Finished difference Result 190 states and 375 transitions. [2021-06-05 14:46:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:46:10,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:10,921 INFO L225 Difference]: With dead ends: 190 [2021-06-05 14:46:10,921 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 14:46:10,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 739.3ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 14:46:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2021-06-05 14:46:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-06-05 14:46:10,923 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 20 [2021-06-05 14:46:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:10,923 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-06-05 14:46:10,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-06-05 14:46:10,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:10,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:10,923 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:11,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26153,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:11,123 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash 551209473, now seen corresponding path program 544 times [2021-06-05 14:46:11,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:11,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537923779] [2021-06-05 14:46:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:11,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:11,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537923779] [2021-06-05 14:46:11,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537923779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:11,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753626834] [2021-06-05 14:46:11,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:11,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:11,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:11,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:11,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:11,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:11,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:11,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:11,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:11,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:11,710 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:11,713 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:11,717 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:11,720 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:11,723 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:11,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:46:11,770 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:46:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:11,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753626834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:11,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:11,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:46:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001619761] [2021-06-05 14:46:11,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:11,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:11,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:11,933 INFO L87 Difference]: Start difference. First operand 126 states and 263 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:12,779 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-06-05 14:46:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:46:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:12,780 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:46:12,780 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:46:12,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 960.5ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:46:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:46:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-06-05 14:46:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1102362204724407) internal successors, (268), 127 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 268 transitions. [2021-06-05 14:46:12,781 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 268 transitions. Word has length 20 [2021-06-05 14:46:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:12,781 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 268 transitions. [2021-06-05 14:46:12,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 268 transitions. [2021-06-05 14:46:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:12,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:12,781 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:12,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26180 [2021-06-05 14:46:12,982 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1401064339, now seen corresponding path program 545 times [2021-06-05 14:46:12,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:12,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397294678] [2021-06-05 14:46:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:13,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:13,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397294678] [2021-06-05 14:46:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397294678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:13,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164556297] [2021-06-05 14:46:13,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:13,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:46:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:14,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:14,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:14,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:46:14,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:14,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:14,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:14,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:14,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:14,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:14,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:14,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:14,069 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 14:46:14,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:14,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:14,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:14,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:14,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:14,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:14,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:14,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:14,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:14,133 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:46:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:14,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164556297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:14,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:14,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:46:14,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707665139] [2021-06-05 14:46:14,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:46:14,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:14,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:46:14,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:14,215 INFO L87 Difference]: Start difference. First operand 128 states and 268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:14,534 INFO L93 Difference]: Finished difference Result 160 states and 321 transitions. [2021-06-05 14:46:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:46:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:14,534 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:46:14,534 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 14:46:14,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:46:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 14:46:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2021-06-05 14:46:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1076923076923078) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2021-06-05 14:46:14,535 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 20 [2021-06-05 14:46:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:14,536 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2021-06-05 14:46:14,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2021-06-05 14:46:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:14,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:14,536 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:14,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26212,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:14,736 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:14,736 INFO L82 PathProgramCache]: Analyzing trace with hash -497426473, now seen corresponding path program 546 times [2021-06-05 14:46:14,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:14,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205496173] [2021-06-05 14:46:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:14,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:14,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205496173] [2021-06-05 14:46:14,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205496173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:14,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178218225] [2021-06-05 14:46:14,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:15,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:46:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:15,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:15,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:15,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:15,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:15,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:15,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:15,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:15,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:15,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:15,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:46:15,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:15,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:15,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:15,749 INFO L628 ElimStorePlain]: treesize reduction 118, result has 34.4 percent of original size [2021-06-05 14:46:15,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:15,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:15,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:15,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:15,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:15,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:15,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:15,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:15,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:15,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:15,813 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:46:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:15,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178218225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:15,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:15,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:46:15,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492867554] [2021-06-05 14:46:15,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:46:15,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:15,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:46:15,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:15,892 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:16,250 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 14:46:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:16,391 INFO L93 Difference]: Finished difference Result 164 states and 336 transitions. [2021-06-05 14:46:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:46:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:16,392 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:46:16,392 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:46:16,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 763.9ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:46:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:46:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2021-06-05 14:46:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1068702290076335) internal successors, (276), 131 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 276 transitions. [2021-06-05 14:46:16,393 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 276 transitions. Word has length 20 [2021-06-05 14:46:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:16,393 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 276 transitions. [2021-06-05 14:46:16,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 276 transitions. [2021-06-05 14:46:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:16,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:16,393 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:16,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26366,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:16,594 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1528499437, now seen corresponding path program 547 times [2021-06-05 14:46:16,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:16,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023395752] [2021-06-05 14:46:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:16,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023395752] [2021-06-05 14:46:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023395752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066614787] [2021-06-05 14:46:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:17,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:46:17,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:17,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:17,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:17,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:17,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,649 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 14:46:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:17,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:17,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:17,675 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:17,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:17,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:17,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:17,713 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:46:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:17,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066614787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:17,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:17,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:46:17,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68632427] [2021-06-05 14:46:17,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:46:17,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:46:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:17,796 INFO L87 Difference]: Start difference. First operand 132 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:18,337 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:46:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:18,373 INFO L93 Difference]: Finished difference Result 165 states and 333 transitions. [2021-06-05 14:46:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:46:18,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:18,373 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:46:18,374 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:46:18,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 896.7ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:46:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2021-06-05 14:46:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.106060606060606) internal successors, (278), 132 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 278 transitions. [2021-06-05 14:46:18,375 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 278 transitions. Word has length 20 [2021-06-05 14:46:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:18,375 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 278 transitions. [2021-06-05 14:46:18,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 278 transitions. [2021-06-05 14:46:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:18,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:18,375 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:18,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26479 [2021-06-05 14:46:18,576 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 793544791, now seen corresponding path program 548 times [2021-06-05 14:46:18,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:18,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723012169] [2021-06-05 14:46:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:18,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723012169] [2021-06-05 14:46:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723012169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007143558] [2021-06-05 14:46:18,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:18,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:18,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:19,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:19,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:46:19,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:19,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:19,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:19,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:19,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:19,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:19,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:19,511 INFO L628 ElimStorePlain]: treesize reduction 109, result has 35.1 percent of original size [2021-06-05 14:46:19,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:19,514 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:19,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:19,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:19,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:19,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:19,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:19,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:19,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:19,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:19,574 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:46:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007143558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:19,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:19,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:46:19,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672442508] [2021-06-05 14:46:19,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:46:19,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:19,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:46:19,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:19,653 INFO L87 Difference]: Start difference. First operand 133 states and 278 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:20,126 INFO L93 Difference]: Finished difference Result 158 states and 324 transitions. [2021-06-05 14:46:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:46:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:20,127 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:46:20,127 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:46:20,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 710.3ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:46:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:46:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 134. [2021-06-05 14:46:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 280 transitions. [2021-06-05 14:46:20,128 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 280 transitions. Word has length 20 [2021-06-05 14:46:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:20,128 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 280 transitions. [2021-06-05 14:46:20,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 280 transitions. [2021-06-05 14:46:20,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:20,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:20,129 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:20,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26577,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:20,329 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 314260115, now seen corresponding path program 549 times [2021-06-05 14:46:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:20,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34909400] [2021-06-05 14:46:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:20,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:20,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34909400] [2021-06-05 14:46:20,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34909400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:20,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283780813] [2021-06-05 14:46:20,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:20,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:46:20,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:20,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:21,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:21,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:21,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:21,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:21,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:21,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:21,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:46:21,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,798 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-06-05 14:46:21,798 INFO L628 ElimStorePlain]: treesize reduction 496, result has 19.5 percent of original size [2021-06-05 14:46:21,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:21,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:21,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:21,853 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:21,899 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:21,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:21,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:21,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:21,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:21,983 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:22,023 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:22,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:22,061 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:22,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:22,096 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 14:46:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:22,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283780813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:22,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:22,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:46:22,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369748689] [2021-06-05 14:46:22,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:46:22,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:22,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:46:22,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:22,235 INFO L87 Difference]: Start difference. First operand 134 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:22,740 INFO L93 Difference]: Finished difference Result 176 states and 348 transitions. [2021-06-05 14:46:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:46:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:22,741 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:46:22,741 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 14:46:22,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 905.0ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:46:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 14:46:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2021-06-05 14:46:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1076923076923078) internal successors, (274), 130 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2021-06-05 14:46:22,742 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 20 [2021-06-05 14:46:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:22,742 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2021-06-05 14:46:22,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2021-06-05 14:46:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:22,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:22,743 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:22,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26635 [2021-06-05 14:46:22,943 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:22,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1685112193, now seen corresponding path program 550 times [2021-06-05 14:46:22,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:22,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622898337] [2021-06-05 14:46:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:23,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:23,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622898337] [2021-06-05 14:46:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622898337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080503901] [2021-06-05 14:46:23,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:23,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:23,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:23,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:23,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:23,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:23,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:23,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:23,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:23,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:23,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:23,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:24,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:24,006 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:24,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:24,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:24,020 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:24,024 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:24,028 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:24,031 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:24,036 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:24,041 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:24,044 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:24,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:24,048 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,100 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:46:24,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:24,103 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:24,107 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:24,110 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:24,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:24,131 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:46:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:24,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080503901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:24,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:24,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:24,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691897888] [2021-06-05 14:46:24,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:24,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:24,212 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:24,749 INFO L93 Difference]: Finished difference Result 165 states and 338 transitions. [2021-06-05 14:46:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:46:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:24,750 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:46:24,750 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:46:24,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 693.1ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:46:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2021-06-05 14:46:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.106060606060606) internal successors, (278), 132 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 278 transitions. [2021-06-05 14:46:24,751 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 278 transitions. Word has length 20 [2021-06-05 14:46:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:24,751 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 278 transitions. [2021-06-05 14:46:24,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 278 transitions. [2021-06-05 14:46:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:24,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:24,752 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:24,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26778 [2021-06-05 14:46:24,952 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:24,952 INFO L82 PathProgramCache]: Analyzing trace with hash 654039229, now seen corresponding path program 551 times [2021-06-05 14:46:24,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:24,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105247988] [2021-06-05 14:46:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:25,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105247988] [2021-06-05 14:46:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105247988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219403119] [2021-06-05 14:46:25,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:25,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:46:25,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:25,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:25,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:25,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:25,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:25,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:26,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:26,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:26,026 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,030 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,034 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:26,039 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,043 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,047 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:26,051 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:26,054 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:26,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:26,058 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,112 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:46:26,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:26,115 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:26,118 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:26,121 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:26,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:26,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:26,143 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:46:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:26,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219403119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:26,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:26,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:26,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068505618] [2021-06-05 14:46:26,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:26,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:26,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:26,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:26,224 INFO L87 Difference]: Start difference. First operand 133 states and 278 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:26,581 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:46:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:26,683 INFO L93 Difference]: Finished difference Result 162 states and 332 transitions. [2021-06-05 14:46:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:46:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:26,684 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:46:26,684 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:46:26,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 758.1ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:46:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-06-05 14:46:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 280 transitions. [2021-06-05 14:46:26,685 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 280 transitions. Word has length 20 [2021-06-05 14:46:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:26,685 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 280 transitions. [2021-06-05 14:46:26,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 280 transitions. [2021-06-05 14:46:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:26,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:26,685 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:26,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26880 [2021-06-05 14:46:26,886 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1318883839, now seen corresponding path program 552 times [2021-06-05 14:46:26,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:26,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420316830] [2021-06-05 14:46:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:27,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420316830] [2021-06-05 14:46:27,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420316830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840560149] [2021-06-05 14:46:27,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:27,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:46:27,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:28,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:28,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:28,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:28,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:28,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:28,051 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,055 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,059 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,063 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,067 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:28,071 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:28,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:28,076 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:28,083 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,136 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:46:28,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:28,139 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:28,142 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:28,146 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:28,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:28,168 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:579, output treesize:52 [2021-06-05 14:46:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840560149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:28,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:28,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806002640] [2021-06-05 14:46:28,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:28,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:28,251 INFO L87 Difference]: Start difference. First operand 134 states and 280 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:28,686 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:46:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:28,777 INFO L93 Difference]: Finished difference Result 159 states and 326 transitions. [2021-06-05 14:46:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:46:28,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:28,778 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:46:28,778 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:46:28,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:46:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2021-06-05 14:46:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1044776119402986) internal successors, (282), 134 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 282 transitions. [2021-06-05 14:46:28,779 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 282 transitions. Word has length 20 [2021-06-05 14:46:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:28,779 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 282 transitions. [2021-06-05 14:46:28,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 282 transitions. [2021-06-05 14:46:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:28,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:28,780 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:28,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27052,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:28,980 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:28,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1798168515, now seen corresponding path program 553 times [2021-06-05 14:46:28,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:28,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341160826] [2021-06-05 14:46:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:29,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341160826] [2021-06-05 14:46:29,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341160826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643576376] [2021-06-05 14:46:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:30,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:30,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:30,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,105 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:30,110 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:30,115 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:30,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:30,126 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,130 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:30,136 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,140 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,144 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,148 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:30,152 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:30,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:46:30,156 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,251 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:46:30,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:30,255 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:30,259 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:30,263 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:30,266 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:30,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:30,306 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:46:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:30,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643576376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:30,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:30,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:30,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211505133] [2021-06-05 14:46:30,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:30,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:30,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:30,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:30,455 INFO L87 Difference]: Start difference. First operand 135 states and 282 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:30,577 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-06-05 14:46:31,251 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-05 14:46:31,410 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 14:46:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:31,885 INFO L93 Difference]: Finished difference Result 251 states and 491 transitions. [2021-06-05 14:46:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:46:31,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:31,886 INFO L225 Difference]: With dead ends: 251 [2021-06-05 14:46:31,886 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:46:31,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1584.0ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:46:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:46:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 136. [2021-06-05 14:46:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1037037037037036) internal successors, (284), 135 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 284 transitions. [2021-06-05 14:46:31,887 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 284 transitions. Word has length 20 [2021-06-05 14:46:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:31,887 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 284 transitions. [2021-06-05 14:46:31,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 284 transitions. [2021-06-05 14:46:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:31,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:31,888 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:32,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27272 [2021-06-05 14:46:32,088 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:32,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1694275027, now seen corresponding path program 554 times [2021-06-05 14:46:32,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:32,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663570734] [2021-06-05 14:46:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:32,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663570734] [2021-06-05 14:46:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663570734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445906520] [2021-06-05 14:46:32,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:32,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:33,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:33,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:33,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:33,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:33,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:33,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:33,087 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:33,092 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:33,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:33,102 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:33,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:33,106 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:33,110 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:33,113 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,173 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:46:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:33,177 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:33,180 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:33,183 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:33,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:33,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:33,209 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:46:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:33,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445906520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:33,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:33,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:33,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783834556] [2021-06-05 14:46:33,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:33,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:33,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:33,328 INFO L87 Difference]: Start difference. First operand 136 states and 284 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:33,706 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 14:46:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:33,836 INFO L93 Difference]: Finished difference Result 166 states and 340 transitions. [2021-06-05 14:46:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:46:33,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:33,837 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:46:33,837 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:46:33,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:46:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:46:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2021-06-05 14:46:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.102189781021898) internal successors, (288), 137 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 288 transitions. [2021-06-05 14:46:33,838 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 288 transitions. Word has length 20 [2021-06-05 14:46:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:33,838 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 288 transitions. [2021-06-05 14:46:33,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 288 transitions. [2021-06-05 14:46:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:33,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:33,839 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:34,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27389,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:34,039 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash -278648041, now seen corresponding path program 555 times [2021-06-05 14:46:34,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:34,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723043516] [2021-06-05 14:46:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:34,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:34,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723043516] [2021-06-05 14:46:34,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723043516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:34,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27795725] [2021-06-05 14:46:34,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:34,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:46:34,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:34,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:35,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:35,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:35,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:35,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:35,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:35,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:35,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:35,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:35,124 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:35,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:35,129 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:35,132 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:35,136 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:35,139 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,200 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:46:35,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:35,203 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:35,206 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:35,209 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:35,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:35,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:35,235 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:46:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:35,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27795725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:35,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:35,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:35,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836315269] [2021-06-05 14:46:35,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:35,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:35,352 INFO L87 Difference]: Start difference. First operand 138 states and 288 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:35,763 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 14:46:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:35,791 INFO L93 Difference]: Finished difference Result 164 states and 332 transitions. [2021-06-05 14:46:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:46:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:35,792 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:46:35,792 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:46:35,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:46:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:46:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-05 14:46:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 14:46:35,793 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 14:46:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:35,793 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 14:46:35,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 14:46:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:35,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:35,793 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:35,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27572,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:35,994 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash -757932717, now seen corresponding path program 556 times [2021-06-05 14:46:35,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:35,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745803516] [2021-06-05 14:46:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:36,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745803516] [2021-06-05 14:46:36,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745803516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283150307] [2021-06-05 14:46:36,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:36,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:36,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:37,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:37,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:37,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:37,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:37,126 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:37,131 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:46:37,136 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:37,141 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:37,147 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:37,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:37,151 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,255 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 14:46:37,256 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:46:37,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:37,260 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:37,264 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:37,267 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:37,271 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:37,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:37,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:37,316 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:46:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:37,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283150307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:37,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:37,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:37,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449003785] [2021-06-05 14:46:37,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:37,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:37,496 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:38,514 INFO L93 Difference]: Finished difference Result 229 states and 451 transitions. [2021-06-05 14:46:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:46:38,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:38,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:38,515 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:46:38,515 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:46:38,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1126.2ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:46:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:46:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 137. [2021-06-05 14:46:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1029411764705883) internal successors, (286), 136 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 286 transitions. [2021-06-05 14:46:38,516 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 286 transitions. Word has length 20 [2021-06-05 14:46:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:38,516 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 286 transitions. [2021-06-05 14:46:38,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 286 transitions. [2021-06-05 14:46:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:38,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:38,517 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:38,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27751,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:38,717 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash 309097281, now seen corresponding path program 557 times [2021-06-05 14:46:38,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:38,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007662771] [2021-06-05 14:46:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:38,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:38,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007662771] [2021-06-05 14:46:38,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007662771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:38,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377842204] [2021-06-05 14:46:38,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:39,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:46:39,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:39,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:39,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:39,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:39,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:39,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:39,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:39,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:39,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:39,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:39,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:39,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:39,341 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:39,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:39,344 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:39,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:39,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:39,366 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-06-05 14:46:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:39,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377842204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:39,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:39,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:46:39,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387490838] [2021-06-05 14:46:39,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:39,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:39,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:39,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:39,446 INFO L87 Difference]: Start difference. First operand 137 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:39,850 INFO L93 Difference]: Finished difference Result 163 states and 334 transitions. [2021-06-05 14:46:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:46:39,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:39,850 INFO L225 Difference]: With dead ends: 163 [2021-06-05 14:46:39,850 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:46:39,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:46:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:46:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-06-05 14:46:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 14:46:39,851 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 14:46:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:39,852 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 14:46:39,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 14:46:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:39,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:39,852 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:40,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27985 [2021-06-05 14:46:40,052 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:40,052 INFO L82 PathProgramCache]: Analyzing trace with hash -170187395, now seen corresponding path program 558 times [2021-06-05 14:46:40,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:40,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612700065] [2021-06-05 14:46:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:40,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612700065] [2021-06-05 14:46:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612700065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396271671] [2021-06-05 14:46:40,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:40,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:46:40,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:40,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:40,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:40,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:40,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:40,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:40,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:40,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:40,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:40,612 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:40,615 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:40,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:40,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:40,654 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:46:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:40,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396271671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:40,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:40,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:46:40,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219803334] [2021-06-05 14:46:40,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:40,790 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:41,299 INFO L93 Difference]: Finished difference Result 162 states and 332 transitions. [2021-06-05 14:46:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:46:41,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:41,299 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:46:41,299 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:46:41,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:46:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:46:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-06-05 14:46:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 14:46:41,301 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 14:46:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:41,301 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 14:46:41,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 14:46:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:41,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:41,301 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:41,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28022 [2021-06-05 14:46:41,502 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash -705417197, now seen corresponding path program 559 times [2021-06-05 14:46:41,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:41,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621819737] [2021-06-05 14:46:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:41,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:41,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621819737] [2021-06-05 14:46:41,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621819737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:41,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690365539] [2021-06-05 14:46:41,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:41,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:42,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:42,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:42,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:42,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:42,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:42,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:42,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:42,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:42,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:42,084 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:42,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:42,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:42,124 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:46:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:42,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690365539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:42,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:42,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:46:42,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466009659] [2021-06-05 14:46:42,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:42,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:42,265 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:42,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:42,992 INFO L93 Difference]: Finished difference Result 170 states and 350 transitions. [2021-06-05 14:46:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:46:42,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:42,993 INFO L225 Difference]: With dead ends: 170 [2021-06-05 14:46:42,993 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 14:46:42,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 845.2ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:46:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 14:46:42,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-06-05 14:46:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.101449275362319) internal successors, (290), 138 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 290 transitions. [2021-06-05 14:46:42,994 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 290 transitions. Word has length 20 [2021-06-05 14:46:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:42,994 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 290 transitions. [2021-06-05 14:46:42,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 290 transitions. [2021-06-05 14:46:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:42,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:42,994 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:43,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28046,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:43,195 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash 624334103, now seen corresponding path program 560 times [2021-06-05 14:46:43,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:43,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912617272] [2021-06-05 14:46:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:43,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:43,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912617272] [2021-06-05 14:46:43,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912617272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:43,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032633988] [2021-06-05 14:46:43,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:43,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:44,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:44,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:44,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:44,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,232 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,236 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,240 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:44,244 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:44,249 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:44,254 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,257 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:44,261 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:44,264 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,317 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:46:44,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:44,320 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:44,323 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:44,326 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:44,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:44,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:44,348 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:46:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:44,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032633988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:44,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:44,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:44,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172902517] [2021-06-05 14:46:44,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:44,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:44,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:44,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:44,426 INFO L87 Difference]: Start difference. First operand 139 states and 290 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:44,872 INFO L93 Difference]: Finished difference Result 174 states and 356 transitions. [2021-06-05 14:46:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:46:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:44,872 INFO L225 Difference]: With dead ends: 174 [2021-06-05 14:46:44,872 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:46:44,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:46:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 142. [2021-06-05 14:46:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.099290780141844) internal successors, (296), 141 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 296 transitions. [2021-06-05 14:46:44,874 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 296 transitions. Word has length 20 [2021-06-05 14:46:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:44,874 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 296 transitions. [2021-06-05 14:46:44,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 296 transitions. [2021-06-05 14:46:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:44,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:44,874 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:45,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28071 [2021-06-05 14:46:45,075 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash -406738861, now seen corresponding path program 561 times [2021-06-05 14:46:45,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:45,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792372212] [2021-06-05 14:46:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:45,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792372212] [2021-06-05 14:46:45,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792372212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602661816] [2021-06-05 14:46:45,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:45,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:46:45,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:46,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:46,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:46,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:46,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:46,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:46,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,150 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,154 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,158 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:46,162 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:46,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:46,167 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,171 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,174 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:46,177 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,229 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:46:46,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:46,233 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:46,236 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:46,239 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:46,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:46,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:46,260 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:46:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602661816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225425859] [2021-06-05 14:46:46,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:46,341 INFO L87 Difference]: Start difference. First operand 142 states and 296 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:46,709 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:46:46,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:46,812 INFO L93 Difference]: Finished difference Result 171 states and 350 transitions. [2021-06-05 14:46:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:46:46,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:46,813 INFO L225 Difference]: With dead ends: 171 [2021-06-05 14:46:46,813 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:46:46,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:46:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:46:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2021-06-05 14:46:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.0985915492957745) internal successors, (298), 142 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 298 transitions. [2021-06-05 14:46:46,814 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 298 transitions. Word has length 20 [2021-06-05 14:46:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:46,815 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 298 transitions. [2021-06-05 14:46:46,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 298 transitions. [2021-06-05 14:46:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:46,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:46,815 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:47,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28173 [2021-06-05 14:46:47,015 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1915305367, now seen corresponding path program 562 times [2021-06-05 14:46:47,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:47,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654763081] [2021-06-05 14:46:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:47,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:47,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654763081] [2021-06-05 14:46:47,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654763081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:47,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321361479] [2021-06-05 14:46:47,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:47,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:47,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:48,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:48,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:48,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:48,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:48,112 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:48,117 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,121 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,129 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:48,133 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,137 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:48,140 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:48,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:48,144 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,196 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:46:48,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:48,199 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:48,202 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:48,205 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:48,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:48,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:48,227 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:46:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:48,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321361479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:48,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:48,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:46:48,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293698353] [2021-06-05 14:46:48,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:46:48,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:48,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:46:48,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:48,310 INFO L87 Difference]: Start difference. First operand 143 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:48,687 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:46:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:48,776 INFO L93 Difference]: Finished difference Result 168 states and 344 transitions. [2021-06-05 14:46:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:46:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:48,776 INFO L225 Difference]: With dead ends: 168 [2021-06-05 14:46:48,776 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:46:48,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 815.4ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:46:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:46:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2021-06-05 14:46:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.097902097902098) internal successors, (300), 143 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 300 transitions. [2021-06-05 14:46:48,778 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 300 transitions. Word has length 20 [2021-06-05 14:46:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:48,778 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 300 transitions. [2021-06-05 14:46:48,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 300 transitions. [2021-06-05 14:46:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:48,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:48,778 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:48,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28350,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:48,979 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1436020691, now seen corresponding path program 563 times [2021-06-05 14:46:48,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:48,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178703621] [2021-06-05 14:46:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:49,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:49,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178703621] [2021-06-05 14:46:49,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178703621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:49,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3136949] [2021-06-05 14:46:49,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:49,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:46:49,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:50,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:50,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:46:50,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:50,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,280 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:50,286 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:50,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:50,299 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:50,306 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,311 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:46:50,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,322 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,327 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:50,332 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,336 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:50,342 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,346 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,351 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:50,354 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,484 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 14:46:50,485 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 14:46:50,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:50,489 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:50,493 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:50,497 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:50,501 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:50,504 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:50,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:50,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:46:50,556 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-06-05 14:46:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:50,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3136949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:50,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:50,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:46:50,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966615138] [2021-06-05 14:46:50,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:46:50,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:50,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:46:50,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:50,744 INFO L87 Difference]: Start difference. First operand 144 states and 300 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:51,309 INFO L93 Difference]: Finished difference Result 186 states and 368 transitions. [2021-06-05 14:46:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:46:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:51,310 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:46:51,310 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:46:51,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1033.5ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:46:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:46:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 141. [2021-06-05 14:46:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1) internal successors, (294), 140 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 294 transitions. [2021-06-05 14:46:51,311 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 294 transitions. Word has length 20 [2021-06-05 14:46:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:51,311 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 294 transitions. [2021-06-05 14:46:51,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 294 transitions. [2021-06-05 14:46:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:51,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:51,312 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:51,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28492 [2021-06-05 14:46:51,512 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash 633496937, now seen corresponding path program 564 times [2021-06-05 14:46:51,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:51,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958330943] [2021-06-05 14:46:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:51,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:51,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958330943] [2021-06-05 14:46:51,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958330943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:51,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415856214] [2021-06-05 14:46:51,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:51,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:46:51,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:52,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:52,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:52,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:52,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:52,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:52,542 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:52,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:52,552 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:52,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:52,561 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:52,564 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:52,568 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:52,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:52,571 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,632 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:46:52,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:52,636 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:52,639 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:52,642 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:52,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:52,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:52,674 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:46:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415856214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:52,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:52,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:52,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146819528] [2021-06-05 14:46:52,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:52,786 INFO L87 Difference]: Start difference. First operand 141 states and 294 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:53,184 INFO L93 Difference]: Finished difference Result 166 states and 335 transitions. [2021-06-05 14:46:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:46:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:53,185 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:46:53,185 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:46:53,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:46:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:46:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-06-05 14:46:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.0985915492957745) internal successors, (298), 142 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 298 transitions. [2021-06-05 14:46:53,186 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 298 transitions. Word has length 20 [2021-06-05 14:46:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:53,186 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 298 transitions. [2021-06-05 14:46:53,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 298 transitions. [2021-06-05 14:46:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:53,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:53,186 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:53,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28704,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:53,387 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:53,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1339426131, now seen corresponding path program 565 times [2021-06-05 14:46:53,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:53,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344664141] [2021-06-05 14:46:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:53,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:53,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344664141] [2021-06-05 14:46:53,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344664141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:53,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770841710] [2021-06-05 14:46:53,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:54,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:54,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:54,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:54,427 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,431 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:54,443 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:54,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,452 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:54,457 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,460 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:54,469 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:54,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:54,473 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,533 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:46:54,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:54,536 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:54,539 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:54,542 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:54,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:54,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:54,568 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:46:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770841710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:54,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:54,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:54,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373758652] [2021-06-05 14:46:54,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:54,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:54,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:54,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:54,679 INFO L87 Difference]: Start difference. First operand 143 states and 298 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:55,061 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:46:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:55,152 INFO L93 Difference]: Finished difference Result 168 states and 344 transitions. [2021-06-05 14:46:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:46:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:55,152 INFO L225 Difference]: With dead ends: 168 [2021-06-05 14:46:55,152 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:46:55,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 655.1ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:46:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:46:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2021-06-05 14:46:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.097902097902098) internal successors, (300), 143 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 300 transitions. [2021-06-05 14:46:55,154 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 300 transitions. Word has length 20 [2021-06-05 14:46:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:55,154 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 300 transitions. [2021-06-05 14:46:55,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 300 transitions. [2021-06-05 14:46:55,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:55,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:55,154 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:55,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28852,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:55,355 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:55,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1818710807, now seen corresponding path program 566 times [2021-06-05 14:46:55,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:55,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834768996] [2021-06-05 14:46:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:55,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:55,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834768996] [2021-06-05 14:46:55,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834768996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:55,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742785288] [2021-06-05 14:46:55,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:55,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:55,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:55,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:55,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:56,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:56,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,697 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:56,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:46:56,708 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:46:56,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,719 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:46:56,725 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,730 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,736 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,741 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:56,746 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:46:56,752 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,757 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:46:56,762 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:46:56,768 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:56,772 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:46:56,777 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,915 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:46:56,916 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:46:56,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:56,920 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:56,924 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:56,928 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:56,932 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:56,936 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:56,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:56,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:46:56,995 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:46:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742785288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:57,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:57,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:46:57,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480174870] [2021-06-05 14:46:57,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:57,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:57,180 INFO L87 Difference]: Start difference. First operand 144 states and 300 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:58,100 INFO L93 Difference]: Finished difference Result 234 states and 461 transitions. [2021-06-05 14:46:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:46:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:58,100 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:46:58,101 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 14:46:58,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1134.8ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:46:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 14:46:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2021-06-05 14:46:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.099290780141844) internal successors, (296), 141 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 296 transitions. [2021-06-05 14:46:58,102 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 296 transitions. Word has length 20 [2021-06-05 14:46:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:58,102 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 296 transitions. [2021-06-05 14:46:58,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 296 transitions. [2021-06-05 14:46:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:58,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:58,102 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:58,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29036,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:58,303 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash -751680809, now seen corresponding path program 567 times [2021-06-05 14:46:58,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:58,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376013612] [2021-06-05 14:46:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:58,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:58,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376013612] [2021-06-05 14:46:58,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376013612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:58,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934202286] [2021-06-05 14:46:58,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:58,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:46:58,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:58,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:58,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:58,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:58,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:58,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:58,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:58,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:58,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:58,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:58,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:58,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:46:58,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:58,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:58,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:58,948 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:46:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:59,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934202286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:59,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:59,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:46:59,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178947493] [2021-06-05 14:46:59,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:59,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:59,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:59,023 INFO L87 Difference]: Start difference. First operand 142 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:59,234 INFO L93 Difference]: Finished difference Result 159 states and 322 transitions. [2021-06-05 14:46:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:46:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:46:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:59,235 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:46:59,235 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:46:59,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:46:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-06-05 14:46:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.097902097902098) internal successors, (300), 143 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 300 transitions. [2021-06-05 14:46:59,236 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 300 transitions. Word has length 20 [2021-06-05 14:46:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:59,236 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 300 transitions. [2021-06-05 14:46:59,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 300 transitions. [2021-06-05 14:46:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:46:59,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:59,237 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:59,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29167,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:59,437 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1230965485, now seen corresponding path program 568 times [2021-06-05 14:46:59,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:59,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569752833] [2021-06-05 14:46:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:59,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569752833] [2021-06-05 14:46:59,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569752833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136199275] [2021-06-05 14:46:59,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:59,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:59,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:59,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:46:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:59,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:46:59,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:59,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:46:59,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:46:59,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:00,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:00,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:00,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:00,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:00,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:00,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:00,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:00,073 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:00,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:00,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:00,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:00,080 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:00,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:00,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:47:00,131 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-06-05 14:47:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:00,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136199275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:00,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:00,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:00,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049036356] [2021-06-05 14:47:00,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:00,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:00,302 INFO L87 Difference]: Start difference. First operand 144 states and 300 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:00,577 INFO L93 Difference]: Finished difference Result 159 states and 323 transitions. [2021-06-05 14:47:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:47:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:00,578 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:47:00,578 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:47:00,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:47:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-06-05 14:47:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.0985915492957745) internal successors, (298), 142 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 298 transitions. [2021-06-05 14:47:00,579 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 298 transitions. Word has length 20 [2021-06-05 14:47:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:00,579 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 298 transitions. [2021-06-05 14:47:00,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 298 transitions. [2021-06-05 14:47:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:00,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:00,580 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:00,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29211 [2021-06-05 14:47:00,780 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1766195287, now seen corresponding path program 569 times [2021-06-05 14:47:00,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:00,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619397587] [2021-06-05 14:47:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:01,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:01,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619397587] [2021-06-05 14:47:01,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619397587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:01,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508922589] [2021-06-05 14:47:01,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:01,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:47:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:01,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:01,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:01,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:01,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:01,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:01,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:01,433 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:01,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:01,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:01,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:01,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:01,482 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:47:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508922589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:01,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:01,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71011574] [2021-06-05 14:47:01,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:01,618 INFO L87 Difference]: Start difference. First operand 143 states and 298 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:02,579 INFO L93 Difference]: Finished difference Result 201 states and 403 transitions. [2021-06-05 14:47:02,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:47:02,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:02,580 INFO L225 Difference]: With dead ends: 201 [2021-06-05 14:47:02,580 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 14:47:02,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1143.2ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:47:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 14:47:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2021-06-05 14:47:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1041666666666665) internal successors, (303), 144 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 303 transitions. [2021-06-05 14:47:02,581 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 303 transitions. Word has length 20 [2021-06-05 14:47:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:02,581 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 303 transitions. [2021-06-05 14:47:02,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 303 transitions. [2021-06-05 14:47:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:02,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:02,582 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:02,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29248,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:02,782 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1478931693, now seen corresponding path program 570 times [2021-06-05 14:47:02,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:02,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840400634] [2021-06-05 14:47:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:03,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:03,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840400634] [2021-06-05 14:47:03,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840400634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:03,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426921671] [2021-06-05 14:47:03,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:03,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:47:03,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:03,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:03,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:03,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:03,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:03,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:03,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:03,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:03,761 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:03,766 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:03,770 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:03,775 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:03,780 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:03,783 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,844 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:47:03,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:03,847 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:03,850 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:03,853 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:03,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:03,879 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:47:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:03,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426921671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:03,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:03,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:03,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636033658] [2021-06-05 14:47:03,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:03,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:03,990 INFO L87 Difference]: Start difference. First operand 145 states and 303 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:04,396 INFO L93 Difference]: Finished difference Result 176 states and 361 transitions. [2021-06-05 14:47:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:47:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:04,396 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:47:04,396 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 14:47:04,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 14:47:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-06-05 14:47:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1020408163265305) internal successors, (309), 147 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 309 transitions. [2021-06-05 14:47:04,398 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 309 transitions. Word has length 20 [2021-06-05 14:47:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:04,398 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 309 transitions. [2021-06-05 14:47:04,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 309 transitions. [2021-06-05 14:47:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:04,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:04,398 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:04,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29274 [2021-06-05 14:47:04,599 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:04,599 INFO L82 PathProgramCache]: Analyzing trace with hash 843112535, now seen corresponding path program 571 times [2021-06-05 14:47:04,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:04,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701903422] [2021-06-05 14:47:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:04,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:04,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701903422] [2021-06-05 14:47:04,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701903422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:04,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423277426] [2021-06-05 14:47:04,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:04,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:05,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:05,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:05,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:05,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:05,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:05,616 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,629 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,633 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:05,638 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,641 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,645 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:05,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:47:05,649 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:05,652 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,713 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:47:05,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:05,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:05,720 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:05,723 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:05,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:05,749 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:47:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423277426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:05,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:05,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032338495] [2021-06-05 14:47:05,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:05,860 INFO L87 Difference]: Start difference. First operand 148 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:06,203 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 14:47:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:06,239 INFO L93 Difference]: Finished difference Result 164 states and 333 transitions. [2021-06-05 14:47:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:47:06,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:06,239 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:47:06,240 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:47:06,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 577.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:47:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-06-05 14:47:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1013513513513513) internal successors, (311), 148 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 311 transitions. [2021-06-05 14:47:06,241 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 311 transitions. Word has length 20 [2021-06-05 14:47:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:06,241 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 311 transitions. [2021-06-05 14:47:06,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 311 transitions. [2021-06-05 14:47:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:06,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:06,241 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:06,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29391 [2021-06-05 14:47:06,442 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:06,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:06,442 INFO L82 PathProgramCache]: Analyzing trace with hash 363827859, now seen corresponding path program 572 times [2021-06-05 14:47:06,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:06,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062070700] [2021-06-05 14:47:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:06,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:06,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062070700] [2021-06-05 14:47:06,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062070700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:06,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331360454] [2021-06-05 14:47:06,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:06,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:06,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:07,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:07,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:07,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:07,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:47:07,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,771 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,776 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,781 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:47:07,787 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,792 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:07,798 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,803 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:07,809 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,813 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:07,819 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:07,824 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,828 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:07,832 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:07,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:47:07,836 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,979 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 14:47:07,979 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-06-05 14:47:07,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:07,984 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:07,988 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:07,991 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:07,996 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:07,999 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:08,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:08,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:47:08,060 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:117 [2021-06-05 14:47:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:08,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331360454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:08,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:08,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:08,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124791165] [2021-06-05 14:47:08,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:08,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:08,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:08,274 INFO L87 Difference]: Start difference. First operand 149 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:08,809 INFO L93 Difference]: Finished difference Result 172 states and 353 transitions. [2021-06-05 14:47:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:47:08,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:08,810 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:47:08,810 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 14:47:08,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 14:47:08,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-06-05 14:47:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1020408163265305) internal successors, (309), 147 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 309 transitions. [2021-06-05 14:47:08,811 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 309 transitions. Word has length 20 [2021-06-05 14:47:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:08,811 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 309 transitions. [2021-06-05 14:47:08,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 309 transitions. [2021-06-05 14:47:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:08,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:08,812 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:09,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29562,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:09,012 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1430857857, now seen corresponding path program 573 times [2021-06-05 14:47:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:09,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784983697] [2021-06-05 14:47:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:09,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:09,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784983697] [2021-06-05 14:47:09,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784983697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:09,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836869337] [2021-06-05 14:47:09,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:09,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:47:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:09,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:09,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:09,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:09,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:09,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:09,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:09,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:09,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:09,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:09,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:09,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:09,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:09,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:09,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:09,608 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:47:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:09,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836869337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:09,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:09,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:09,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502459736] [2021-06-05 14:47:09,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:09,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:09,683 INFO L87 Difference]: Start difference. First operand 148 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:09,939 INFO L93 Difference]: Finished difference Result 170 states and 345 transitions. [2021-06-05 14:47:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:47:09,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:09,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:09,939 INFO L225 Difference]: With dead ends: 170 [2021-06-05 14:47:09,939 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 14:47:09,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 14:47:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2021-06-05 14:47:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-06-05 14:47:09,941 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 20 [2021-06-05 14:47:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:09,941 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-06-05 14:47:09,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-06-05 14:47:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:09,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:09,941 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:10,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29863,574 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:10,142 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:10,142 INFO L82 PathProgramCache]: Analyzing trace with hash 951573181, now seen corresponding path program 574 times [2021-06-05 14:47:10,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:10,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123548511] [2021-06-05 14:47:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:10,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:10,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123548511] [2021-06-05 14:47:10,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123548511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:10,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127771541] [2021-06-05 14:47:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:10,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:10,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:10,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:10,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:10,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:10,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:10,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:10,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:10,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:10,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:10,755 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:10,758 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:10,761 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:10,765 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:10,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:47:10,819 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:47:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:10,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127771541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:10,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:10,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:10,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705828990] [2021-06-05 14:47:10,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:10,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:10,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:10,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:10,985 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:11,383 INFO L93 Difference]: Finished difference Result 173 states and 355 transitions. [2021-06-05 14:47:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:47:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:11,383 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:47:11,383 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 14:47:11,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:47:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 14:47:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2021-06-05 14:47:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1013513513513513) internal successors, (311), 148 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 311 transitions. [2021-06-05 14:47:11,385 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 311 transitions. Word has length 20 [2021-06-05 14:47:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:11,385 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 311 transitions. [2021-06-05 14:47:11,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 311 transitions. [2021-06-05 14:47:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:11,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:11,385 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:11,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29885,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:11,585 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:11,586 INFO L82 PathProgramCache]: Analyzing trace with hash 416343379, now seen corresponding path program 575 times [2021-06-05 14:47:11,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:11,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794130687] [2021-06-05 14:47:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:11,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794130687] [2021-06-05 14:47:11,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794130687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119827098] [2021-06-05 14:47:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:11,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:47:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:12,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:12,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:12,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:12,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:12,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:12,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:12,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:12,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:12,193 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:12,196 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:12,199 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:12,202 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:12,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:12,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:47:12,252 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:47:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:12,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119827098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:12,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:12,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:12,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134150703] [2021-06-05 14:47:12,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:12,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:12,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:12,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:12,427 INFO L87 Difference]: Start difference. First operand 149 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:13,240 INFO L93 Difference]: Finished difference Result 225 states and 444 transitions. [2021-06-05 14:47:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:47:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:13,241 INFO L225 Difference]: With dead ends: 225 [2021-06-05 14:47:13,241 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 14:47:13,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 996.3ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:47:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 14:47:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 152. [2021-06-05 14:47:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.119205298013245) internal successors, (320), 151 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 320 transitions. [2021-06-05 14:47:13,242 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 320 transitions. Word has length 20 [2021-06-05 14:47:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:13,242 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 320 transitions. [2021-06-05 14:47:13,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 320 transitions. [2021-06-05 14:47:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:13,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:13,242 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:13,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29920,576 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:13,443 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1823873641, now seen corresponding path program 576 times [2021-06-05 14:47:13,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:13,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977117126] [2021-06-05 14:47:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:13,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977117126] [2021-06-05 14:47:13,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977117126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102702394] [2021-06-05 14:47:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:13,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:47:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:13,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:13,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:13,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:13,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:13,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:13,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:13,991 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:13,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:14,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:14,015 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:47:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:14,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102702394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:14,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:14,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277660434] [2021-06-05 14:47:14,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:14,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:14,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:14,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:14,098 INFO L87 Difference]: Start difference. First operand 152 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:14,458 INFO L93 Difference]: Finished difference Result 179 states and 370 transitions. [2021-06-05 14:47:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:47:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:14,459 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:47:14,459 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:47:14,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:47:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:47:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2021-06-05 14:47:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.116883116883117) internal successors, (326), 154 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 326 transitions. [2021-06-05 14:47:14,460 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 326 transitions. Word has length 20 [2021-06-05 14:47:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:14,460 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 326 transitions. [2021-06-05 14:47:14,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 326 transitions. [2021-06-05 14:47:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:14,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:14,461 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:14,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29944 [2021-06-05 14:47:14,661 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1991808979, now seen corresponding path program 577 times [2021-06-05 14:47:14,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:14,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579701586] [2021-06-05 14:47:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:14,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:14,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579701586] [2021-06-05 14:47:14,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579701586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:14,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744175438] [2021-06-05 14:47:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:14,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:15,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:15,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:15,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:15,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:15,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:15,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:15,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:15,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:15,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:15,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:15,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:15,307 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:47:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:15,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744175438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:15,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:15,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426607079] [2021-06-05 14:47:15,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:15,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:15,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:15,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:15,437 INFO L87 Difference]: Start difference. First operand 155 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:15,919 INFO L93 Difference]: Finished difference Result 178 states and 368 transitions. [2021-06-05 14:47:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:47:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:15,920 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:47:15,920 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:47:15,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 610.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:47:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:47:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2021-06-05 14:47:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1176470588235294) internal successors, (324), 153 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 324 transitions. [2021-06-05 14:47:15,921 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 324 transitions. Word has length 20 [2021-06-05 14:47:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:15,921 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 324 transitions. [2021-06-05 14:47:15,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 324 transitions. [2021-06-05 14:47:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:15,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:15,922 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:16,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29964,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:16,131 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1456579177, now seen corresponding path program 578 times [2021-06-05 14:47:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:16,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747310280] [2021-06-05 14:47:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:16,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:16,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747310280] [2021-06-05 14:47:16,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747310280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:16,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122532993] [2021-06-05 14:47:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:16,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:16,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:16,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:16,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:16,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:16,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:16,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:16,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:16,722 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:16,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:16,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:16,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:16,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:16,771 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:47:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:16,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122532993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:16,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:16,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:16,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188967678] [2021-06-05 14:47:16,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:16,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:16,903 INFO L87 Difference]: Start difference. First operand 154 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:17,746 INFO L93 Difference]: Finished difference Result 216 states and 437 transitions. [2021-06-05 14:47:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:47:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:17,747 INFO L225 Difference]: With dead ends: 216 [2021-06-05 14:47:17,747 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:47:17,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 945.7ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:47:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:47:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 153. [2021-06-05 14:47:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1184210526315788) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 322 transitions. [2021-06-05 14:47:17,748 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 322 transitions. Word has length 20 [2021-06-05 14:47:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:17,748 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 322 transitions. [2021-06-05 14:47:17,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 322 transitions. [2021-06-05 14:47:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:17,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:17,749 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:17,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29995,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:17,949 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2044324499, now seen corresponding path program 579 times [2021-06-05 14:47:17,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:17,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460451771] [2021-06-05 14:47:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:18,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:18,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460451771] [2021-06-05 14:47:18,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460451771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:18,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158366979] [2021-06-05 14:47:18,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:18,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:47:18,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:19,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:19,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,110 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:19,116 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:19,121 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,130 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:19,134 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:19,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:19,144 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:47:19,148 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:19,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:19,152 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,247 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:47:19,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:19,251 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:19,254 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:19,258 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:19,261 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:19,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:19,302 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:47:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:19,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158366979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:19,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:19,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:19,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608544111] [2021-06-05 14:47:19,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:19,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:19,437 INFO L87 Difference]: Start difference. First operand 153 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:19,803 INFO L93 Difference]: Finished difference Result 194 states and 397 transitions. [2021-06-05 14:47:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:47:19,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:19,803 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:47:19,803 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:47:19,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:47:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2021-06-05 14:47:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.129032258064516) internal successors, (330), 155 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 330 transitions. [2021-06-05 14:47:19,804 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 330 transitions. Word has length 20 [2021-06-05 14:47:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:19,805 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 330 transitions. [2021-06-05 14:47:19,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 330 transitions. [2021-06-05 14:47:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:19,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:19,805 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:20,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30022 [2021-06-05 14:47:20,005 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1100343233, now seen corresponding path program 580 times [2021-06-05 14:47:20,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:20,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037637680] [2021-06-05 14:47:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:20,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037637680] [2021-06-05 14:47:20,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037637680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929287718] [2021-06-05 14:47:20,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:20,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:20,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:20,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:20,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:47:20,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:20,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:20,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:20,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:20,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:21,038 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-06-05 14:47:21,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:21,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:21,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:21,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:21,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:21,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:21,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:21,084 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:21,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:21,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:21,102 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:47:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:21,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929287718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:21,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:21,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:47:21,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900992490] [2021-06-05 14:47:21,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:47:21,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:21,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:47:21,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:21,180 INFO L87 Difference]: Start difference. First operand 156 states and 330 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:21,526 INFO L93 Difference]: Finished difference Result 189 states and 385 transitions. [2021-06-05 14:47:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:47:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:21,526 INFO L225 Difference]: With dead ends: 189 [2021-06-05 14:47:21,526 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:47:21,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 630.6ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:47:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:47:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2021-06-05 14:47:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1257861635220126) internal successors, (338), 159 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 338 transitions. [2021-06-05 14:47:21,528 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 338 transitions. Word has length 20 [2021-06-05 14:47:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:21,528 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 338 transitions. [2021-06-05 14:47:21,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 338 transitions. [2021-06-05 14:47:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:21,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:21,528 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:21,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30269,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:21,728 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -798147579, now seen corresponding path program 581 times [2021-06-05 14:47:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:21,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27837350] [2021-06-05 14:47:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:21,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:21,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27837350] [2021-06-05 14:47:21,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27837350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:21,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195211800] [2021-06-05 14:47:21,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:22,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:47:22,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:22,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:22,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:22,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:47:22,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:22,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:22,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:22,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:22,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,744 INFO L628 ElimStorePlain]: treesize reduction 109, result has 35.1 percent of original size [2021-06-05 14:47:22,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:22,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:22,769 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:22,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:22,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:22,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:22,807 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:47:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:22,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195211800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:22,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:22,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:47:22,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533226586] [2021-06-05 14:47:22,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:47:22,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:47:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:22,885 INFO L87 Difference]: Start difference. First operand 160 states and 338 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:23,326 INFO L93 Difference]: Finished difference Result 192 states and 392 transitions. [2021-06-05 14:47:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:47:23,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:23,326 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:47:23,326 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:47:23,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:47:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2021-06-05 14:47:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.125) internal successors, (340), 160 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 340 transitions. [2021-06-05 14:47:23,328 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 340 transitions. Word has length 20 [2021-06-05 14:47:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:23,328 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 340 transitions. [2021-06-05 14:47:23,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 340 transitions. [2021-06-05 14:47:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:23,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:23,328 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:23,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30367 [2021-06-05 14:47:23,529 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:23,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1829220543, now seen corresponding path program 582 times [2021-06-05 14:47:23,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:23,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443052781] [2021-06-05 14:47:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:23,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:23,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443052781] [2021-06-05 14:47:23,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443052781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:23,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303417205] [2021-06-05 14:47:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:23,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:47:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:24,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:24,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:24,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:24,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:24,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:24,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:24,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:47:24,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:24,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:24,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:24,476 INFO L628 ElimStorePlain]: treesize reduction 104, result has 37.3 percent of original size [2021-06-05 14:47:24,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:24,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:24,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:24,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:24,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:24,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:24,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:24,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:24,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:24,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:24,540 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:47:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:24,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303417205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:24,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:24,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:47:24,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786043597] [2021-06-05 14:47:24,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:47:24,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:24,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:47:24,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:24,620 INFO L87 Difference]: Start difference. First operand 161 states and 340 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:25,125 INFO L93 Difference]: Finished difference Result 189 states and 392 transitions. [2021-06-05 14:47:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:47:25,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:25,126 INFO L225 Difference]: With dead ends: 189 [2021-06-05 14:47:25,126 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:47:25,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:47:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:47:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2021-06-05 14:47:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.124223602484472) internal successors, (342), 161 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 342 transitions. [2021-06-05 14:47:25,128 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 342 transitions. Word has length 20 [2021-06-05 14:47:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:25,128 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 342 transitions. [2021-06-05 14:47:25,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 342 transitions. [2021-06-05 14:47:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:25,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:25,128 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:25,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30460 [2021-06-05 14:47:25,328 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash 492823685, now seen corresponding path program 583 times [2021-06-05 14:47:25,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:25,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079991518] [2021-06-05 14:47:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:25,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079991518] [2021-06-05 14:47:25,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079991518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130760030] [2021-06-05 14:47:25,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:26,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:26,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:26,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-06-05 14:47:26,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:26,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:26,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:26,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:26,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,421 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-06-05 14:47:26,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:26,424 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:26,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:26,446 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:26,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:26,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:26,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:26,485 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-06-05 14:47:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130760030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:26,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:26,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:47:26,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57436913] [2021-06-05 14:47:26,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:47:26,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:26,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:47:26,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:26,565 INFO L87 Difference]: Start difference. First operand 162 states and 342 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:26,711 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-06-05 14:47:27,283 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 14:47:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:27,307 INFO L93 Difference]: Finished difference Result 195 states and 400 transitions. [2021-06-05 14:47:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:47:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:27,307 INFO L225 Difference]: With dead ends: 195 [2021-06-05 14:47:27,307 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 14:47:27,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1058.9ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:47:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 14:47:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 163. [2021-06-05 14:47:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.123456790123457) internal successors, (344), 162 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 344 transitions. [2021-06-05 14:47:27,309 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 344 transitions. Word has length 20 [2021-06-05 14:47:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:27,309 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 344 transitions. [2021-06-05 14:47:27,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 344 transitions. [2021-06-05 14:47:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:27,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:27,309 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:27,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30538,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:27,509 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:27,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:27,510 INFO L82 PathProgramCache]: Analyzing trace with hash 13539009, now seen corresponding path program 584 times [2021-06-05 14:47:27,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:27,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106550168] [2021-06-05 14:47:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:27,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106550168] [2021-06-05 14:47:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106550168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225945844] [2021-06-05 14:47:27,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:27,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:28,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:28,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:28,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:28,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:28,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:28,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:28,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:28,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:47:28,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:28,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,825 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-06-05 14:47:28,825 INFO L628 ElimStorePlain]: treesize reduction 490, result has 19.3 percent of original size [2021-06-05 14:47:28,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:28,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:28,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:28,882 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:28,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:28,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:28,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:28,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:28,970 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:29,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:29,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:29,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:29,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:29,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:29,050 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:29,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:29,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:29,088 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:29,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:29,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:29,124 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-06-05 14:47:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225945844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:29,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:29,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:47:29,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544419096] [2021-06-05 14:47:29,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:47:29,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:47:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:29,263 INFO L87 Difference]: Start difference. First operand 163 states and 344 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:29,720 INFO L93 Difference]: Finished difference Result 185 states and 384 transitions. [2021-06-05 14:47:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:47:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:29,720 INFO L225 Difference]: With dead ends: 185 [2021-06-05 14:47:29,720 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:47:29,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:47:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:47:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2021-06-05 14:47:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.125) internal successors, (340), 160 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 340 transitions. [2021-06-05 14:47:29,722 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 340 transitions. Word has length 20 [2021-06-05 14:47:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:29,722 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 340 transitions. [2021-06-05 14:47:29,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 340 transitions. [2021-06-05 14:47:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:29,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:29,722 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:29,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30684 [2021-06-05 14:47:29,923 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1384391087, now seen corresponding path program 585 times [2021-06-05 14:47:29,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:29,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35876440] [2021-06-05 14:47:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:30,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:30,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35876440] [2021-06-05 14:47:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35876440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:30,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893736503] [2021-06-05 14:47:30,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:30,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:47:30,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:30,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:30,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:30,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:30,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:30,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:30,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,949 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,957 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,960 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:30,965 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:47:30,969 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,973 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:30,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:30,977 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:30,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:30,980 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:31,033 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:47:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:31,036 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:31,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:31,039 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:31,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:31,042 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:31,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:31,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:31,064 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:47:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:31,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893736503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:31,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:31,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:31,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948933858] [2021-06-05 14:47:31,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:31,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:31,144 INFO L87 Difference]: Start difference. First operand 161 states and 340 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:31,566 INFO L93 Difference]: Finished difference Result 194 states and 402 transitions. [2021-06-05 14:47:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:47:31,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:31,567 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:47:31,567 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:47:31,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 627.6ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:47:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2021-06-05 14:47:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.123456790123457) internal successors, (344), 162 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 344 transitions. [2021-06-05 14:47:31,569 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 344 transitions. Word has length 20 [2021-06-05 14:47:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:31,569 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 344 transitions. [2021-06-05 14:47:31,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 344 transitions. [2021-06-05 14:47:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:31,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:31,569 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:31,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30793,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:31,769 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:31,770 INFO L82 PathProgramCache]: Analyzing trace with hash 353318123, now seen corresponding path program 586 times [2021-06-05 14:47:31,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:31,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755007405] [2021-06-05 14:47:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:31,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:31,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755007405] [2021-06-05 14:47:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755007405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049576501] [2021-06-05 14:47:31,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:32,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:32,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:32,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:32,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:32,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:32,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:32,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:32,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:32,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:32,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:32,876 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:32,879 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:32,882 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:32,887 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:32,891 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:32,895 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,948 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:47:32,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:32,951 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:32,954 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:32,957 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:32,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:32,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:32,978 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:47:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:33,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049576501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:33,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:33,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:33,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964625313] [2021-06-05 14:47:33,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:33,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:33,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:33,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:33,061 INFO L87 Difference]: Start difference. First operand 163 states and 344 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:33,463 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:47:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:33,595 INFO L93 Difference]: Finished difference Result 191 states and 396 transitions. [2021-06-05 14:47:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:47:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:33,596 INFO L225 Difference]: With dead ends: 191 [2021-06-05 14:47:33,596 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:47:33,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 712.7ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:47:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 164. [2021-06-05 14:47:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1226993865030677) internal successors, (346), 163 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 346 transitions. [2021-06-05 14:47:33,597 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 346 transitions. Word has length 20 [2021-06-05 14:47:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:33,597 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 346 transitions. [2021-06-05 14:47:33,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 346 transitions. [2021-06-05 14:47:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:33,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:33,597 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:33,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30991 [2021-06-05 14:47:33,798 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:33,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1619604945, now seen corresponding path program 587 times [2021-06-05 14:47:33,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:33,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332216994] [2021-06-05 14:47:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:34,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:34,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332216994] [2021-06-05 14:47:34,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332216994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:34,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448644326] [2021-06-05 14:47:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:34,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:47:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:34,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:34,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:34,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:34,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:34,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:34,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:34,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:34,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:34,968 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:34,973 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:34,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:34,978 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:34,982 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:34,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:34,985 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:35,037 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:47:35,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:35,041 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:35,044 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:35,047 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:35,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:35,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:35,069 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:47:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:35,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448644326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:35,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:35,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:35,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535818674] [2021-06-05 14:47:35,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:35,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:35,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:35,150 INFO L87 Difference]: Start difference. First operand 164 states and 346 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:35,610 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:47:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:35,725 INFO L93 Difference]: Finished difference Result 188 states and 390 transitions. [2021-06-05 14:47:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:47:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:35,725 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:47:35,725 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:47:35,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:47:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2021-06-05 14:47:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-05 14:47:35,727 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 20 [2021-06-05 14:47:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:35,727 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-05 14:47:35,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-05 14:47:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:35,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:35,727 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:35,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31175,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:35,928 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2098889621, now seen corresponding path program 588 times [2021-06-05 14:47:35,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:35,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171898048] [2021-06-05 14:47:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:36,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:36,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171898048] [2021-06-05 14:47:36,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171898048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:36,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274105248] [2021-06-05 14:47:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:36,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:47:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:36,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:36,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:37,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:37,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:47:37,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:37,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,316 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:47:37,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,336 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,340 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:37,346 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,351 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,355 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:47:37,360 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:37,366 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:37,371 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:37,376 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:37,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:37,381 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,385 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:37,389 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,519 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 14:47:37,519 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.7 percent of original size [2021-06-05 14:47:37,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:37,523 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:37,527 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:37,531 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:37,535 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:37,538 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:37,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:37,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:47:37,591 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:905, output treesize:104 [2021-06-05 14:47:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:37,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274105248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:37,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:37,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:37,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884795792] [2021-06-05 14:47:37,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:37,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:37,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:37,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:37,770 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:37,898 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-06-05 14:47:38,588 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 14:47:38,742 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-05 14:47:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:39,207 INFO L93 Difference]: Finished difference Result 281 states and 557 transitions. [2021-06-05 14:47:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:47:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:39,207 INFO L225 Difference]: With dead ends: 281 [2021-06-05 14:47:39,207 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 14:47:39,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1590.3ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:47:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 14:47:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 162. [2021-06-05 14:47:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.124223602484472) internal successors, (342), 161 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 342 transitions. [2021-06-05 14:47:39,209 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 342 transitions. Word has length 20 [2021-06-05 14:47:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:39,209 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 342 transitions. [2021-06-05 14:47:39,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 342 transitions. [2021-06-05 14:47:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:39,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:39,210 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:39,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31360,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:39,420 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:39,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1393553921, now seen corresponding path program 589 times [2021-06-05 14:47:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:39,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525033220] [2021-06-05 14:47:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:39,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525033220] [2021-06-05 14:47:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525033220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447949084] [2021-06-05 14:47:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:40,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:40,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:40,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:40,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:40,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:40,395 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:40,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:40,409 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:40,413 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:40,417 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:40,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:40,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:40,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:40,429 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,490 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:47:40,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:40,493 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:40,496 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:40,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:40,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:40,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:40,525 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:47:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:40,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447949084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:40,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:40,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:40,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622046285] [2021-06-05 14:47:40,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:40,635 INFO L87 Difference]: Start difference. First operand 162 states and 342 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:40,972 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:47:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:41,085 INFO L93 Difference]: Finished difference Result 191 states and 396 transitions. [2021-06-05 14:47:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:47:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:41,086 INFO L225 Difference]: With dead ends: 191 [2021-06-05 14:47:41,086 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:47:41,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 655.4ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:47:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:47:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 164. [2021-06-05 14:47:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1226993865030677) internal successors, (346), 163 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 346 transitions. [2021-06-05 14:47:41,087 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 346 transitions. Word has length 20 [2021-06-05 14:47:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:41,087 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 346 transitions. [2021-06-05 14:47:41,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 346 transitions. [2021-06-05 14:47:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:41,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:41,087 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:41,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31673 [2021-06-05 14:47:41,288 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash -579369147, now seen corresponding path program 590 times [2021-06-05 14:47:41,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:41,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997074653] [2021-06-05 14:47:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:41,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:41,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997074653] [2021-06-05 14:47:41,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997074653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:41,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700621997] [2021-06-05 14:47:41,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:41,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:42,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:47:42,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:42,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:42,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:42,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:42,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,462 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,466 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,471 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:42,475 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,479 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,483 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:42,486 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:42,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:42,490 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,550 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:47:42,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:42,554 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:42,557 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:42,560 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:42,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:42,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:42,594 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:47:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:42,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700621997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:42,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:42,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:42,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543356072] [2021-06-05 14:47:42,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:42,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:42,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:42,705 INFO L87 Difference]: Start difference. First operand 164 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:43,021 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:47:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:43,052 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-06-05 14:47:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:47:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:43,053 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:47:43,053 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:47:43,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:47:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-06-05 14:47:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-05 14:47:43,055 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 20 [2021-06-05 14:47:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:43,055 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-05 14:47:43,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-05 14:47:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:43,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:43,055 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:43,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31814,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:43,255 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1058653823, now seen corresponding path program 591 times [2021-06-05 14:47:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:43,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544717709] [2021-06-05 14:47:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:43,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:43,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544717709] [2021-06-05 14:47:43,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544717709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:43,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580422717] [2021-06-05 14:47:43,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:43,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:47:43,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:43,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:44,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:44,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:44,372 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:44,383 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:47:44,388 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:44,399 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,403 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:44,409 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:44,420 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:44,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:44,426 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,430 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:44,434 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,541 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 14:47:44,541 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:47:44,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:44,545 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:44,549 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:44,553 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:44,556 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:44,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:44,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:44,603 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:47:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:44,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580422717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:44,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:44,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:44,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385370109] [2021-06-05 14:47:44,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:44,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:44,757 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:45,814 INFO L93 Difference]: Finished difference Result 255 states and 509 transitions. [2021-06-05 14:47:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:47:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:45,815 INFO L225 Difference]: With dead ends: 255 [2021-06-05 14:47:45,815 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:47:45,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1222.3ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:47:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:47:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 163. [2021-06-05 14:47:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.123456790123457) internal successors, (344), 162 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 344 transitions. [2021-06-05 14:47:45,817 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 344 transitions. Word has length 20 [2021-06-05 14:47:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:45,817 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 344 transitions. [2021-06-05 14:47:45,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 344 transitions. [2021-06-05 14:47:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:45,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:45,817 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:46,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31916 [2021-06-05 14:47:46,017 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 8376175, now seen corresponding path program 592 times [2021-06-05 14:47:46,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:46,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230063351] [2021-06-05 14:47:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:46,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:46,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230063351] [2021-06-05 14:47:46,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230063351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:46,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239662335] [2021-06-05 14:47:46,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:46,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:46,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:46,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:46,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:46,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:46,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:46,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:46,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:46,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:46,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:46,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:46,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:46,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:46,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:46,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:46,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:46,589 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:47:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:46,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239662335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:46,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:46,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:46,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874469677] [2021-06-05 14:47:46,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:46,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:46,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:46,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:46,667 INFO L87 Difference]: Start difference. First operand 163 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:46,947 INFO L93 Difference]: Finished difference Result 185 states and 380 transitions. [2021-06-05 14:47:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:47:46,947 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:46,948 INFO L225 Difference]: With dead ends: 185 [2021-06-05 14:47:46,948 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:47:46,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:47:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2021-06-05 14:47:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-06-05 14:47:46,949 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 20 [2021-06-05 14:47:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:46,949 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-06-05 14:47:46,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-06-05 14:47:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:46,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:46,949 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:47,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32097,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:47,161 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash -470908501, now seen corresponding path program 593 times [2021-06-05 14:47:47,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:47,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43697513] [2021-06-05 14:47:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:47,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:47,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43697513] [2021-06-05 14:47:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43697513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:47,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564626175] [2021-06-05 14:47:47,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:47,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:47:47,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:47,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:47,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:47,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:47,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:47,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:47,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:47,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:47,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:47,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:47,757 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:47,760 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:47,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:47,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:47,799 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:47:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:47,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564626175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:47,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:47,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724837071] [2021-06-05 14:47:47,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:47,936 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:48,562 INFO L93 Difference]: Finished difference Result 228 states and 459 transitions. [2021-06-05 14:47:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:47:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:48,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:48,563 INFO L225 Difference]: With dead ends: 228 [2021-06-05 14:47:48,563 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:47:48,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:47:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 166. [2021-06-05 14:47:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-06-05 14:47:48,564 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 20 [2021-06-05 14:47:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:48,564 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-06-05 14:47:48,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-06-05 14:47:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:48,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:48,565 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:48,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32116 [2021-06-05 14:47:48,765 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1006138303, now seen corresponding path program 594 times [2021-06-05 14:47:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:48,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712582927] [2021-06-05 14:47:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:48,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712582927] [2021-06-05 14:47:48,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712582927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594866743] [2021-06-05 14:47:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:49,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:47:49,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:49,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:49,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:49,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:49,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:49,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:49,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:49,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:49,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:49,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:49,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:49,362 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:49,365 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:49,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:49,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:49,405 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:47:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:49,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594866743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:49,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:49,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:47:49,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758898530] [2021-06-05 14:47:49,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:47:49,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:49,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:47:49,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:49,542 INFO L87 Difference]: Start difference. First operand 166 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:50,191 INFO L93 Difference]: Finished difference Result 195 states and 406 transitions. [2021-06-05 14:47:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:47:50,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:50,192 INFO L225 Difference]: With dead ends: 195 [2021-06-05 14:47:50,192 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:47:50,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 742.3ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:47:50,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:47:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2021-06-05 14:47:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-06-05 14:47:50,194 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 20 [2021-06-05 14:47:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:50,194 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-06-05 14:47:50,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-06-05 14:47:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:50,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:50,194 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:50,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32148 [2021-06-05 14:47:50,394 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash 323612997, now seen corresponding path program 595 times [2021-06-05 14:47:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:50,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281061898] [2021-06-05 14:47:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:50,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281061898] [2021-06-05 14:47:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281061898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746145891] [2021-06-05 14:47:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:50,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:51,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:51,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:51,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:51,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:51,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:51,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:51,466 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:51,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:51,474 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:51,478 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:51,482 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:51,486 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:51,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:51,490 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,543 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:47:51,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:51,546 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:51,550 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:51,553 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:51,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:51,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:51,575 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:47:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:51,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746145891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:51,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:51,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:51,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798120814] [2021-06-05 14:47:51,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:51,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:51,656 INFO L87 Difference]: Start difference. First operand 166 states and 350 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:52,100 INFO L93 Difference]: Finished difference Result 200 states and 414 transitions. [2021-06-05 14:47:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:47:52,101 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:52,101 INFO L225 Difference]: With dead ends: 200 [2021-06-05 14:47:52,101 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:47:52,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 709.0ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:47:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2021-06-05 14:47:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.119047619047619) internal successors, (356), 168 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 356 transitions. [2021-06-05 14:47:52,102 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 356 transitions. Word has length 20 [2021-06-05 14:47:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:52,103 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 356 transitions. [2021-06-05 14:47:52,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 356 transitions. [2021-06-05 14:47:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:52,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:52,103 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:52,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32176 [2021-06-05 14:47:52,303 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:52,303 INFO L82 PathProgramCache]: Analyzing trace with hash -707459967, now seen corresponding path program 596 times [2021-06-05 14:47:52,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:52,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810528822] [2021-06-05 14:47:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:52,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:52,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810528822] [2021-06-05 14:47:52,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810528822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:52,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84118375] [2021-06-05 14:47:52,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:52,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:52,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:52,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:52,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:53,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:53,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:53,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:53,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:53,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:53,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:53,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:53,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:53,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:53,386 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:53,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:53,395 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:53,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:53,399 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,466 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:47:53,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:53,470 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:53,474 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:53,477 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:53,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:53,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:53,501 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:47:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:53,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84118375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:53,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:53,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:53,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401261318] [2021-06-05 14:47:53,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:53,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:53,582 INFO L87 Difference]: Start difference. First operand 169 states and 356 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:53,985 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:47:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:54,112 INFO L93 Difference]: Finished difference Result 197 states and 408 transitions. [2021-06-05 14:47:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:47:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:54,112 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:47:54,113 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:47:54,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:47:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2021-06-05 14:47:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 14:47:54,114 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 14:47:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:54,114 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 14:47:54,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 14:47:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:54,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:54,114 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32350 [2021-06-05 14:47:54,315 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1614584261, now seen corresponding path program 597 times [2021-06-05 14:47:54,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:54,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658884499] [2021-06-05 14:47:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:54,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658884499] [2021-06-05 14:47:54,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658884499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288179375] [2021-06-05 14:47:54,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:47:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:55,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:55,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:55,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:55,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:55,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:55,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:55,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:55,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:55,415 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:55,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:55,423 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:55,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:55,427 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:55,430 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,487 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:47:55,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:55,491 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:55,494 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:55,497 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:55,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:55,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:55,518 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:47:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:55,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288179375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:55,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:55,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:55,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554748791] [2021-06-05 14:47:55,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:55,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:55,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:55,598 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:56,004 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:47:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:56,098 INFO L93 Difference]: Finished difference Result 194 states and 402 transitions. [2021-06-05 14:47:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:47:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:56,098 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:47:56,098 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:47:56,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 712.5ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:47:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 171. [2021-06-05 14:47:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 14:47:56,100 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 14:47:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:56,100 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 14:47:56,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 14:47:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:56,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:56,100 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:56,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32534,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:56,300 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1135299585, now seen corresponding path program 598 times [2021-06-05 14:47:56,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:56,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522786590] [2021-06-05 14:47:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:56,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:56,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522786590] [2021-06-05 14:47:56,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522786590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:56,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583426916] [2021-06-05 14:47:56,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:56,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:56,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:56,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:57,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:57,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:57,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,624 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:57,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:57,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:57,640 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:57,645 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:57,650 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,654 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,658 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,662 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:57,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:47:57,667 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:57,670 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,767 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:47:57,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:57,771 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:57,775 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:47:57,778 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:57,782 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:57,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:57,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:57,822 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:47:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:57,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583426916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:57,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:57,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:47:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165440215] [2021-06-05 14:47:57,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:47:57,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:47:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:57,971 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:58,393 INFO L93 Difference]: Finished difference Result 193 states and 400 transitions. [2021-06-05 14:47:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:47:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:47:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:58,393 INFO L225 Difference]: With dead ends: 193 [2021-06-05 14:47:58,393 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:47:58,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 739.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:47:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2021-06-05 14:47:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 354 transitions. [2021-06-05 14:47:58,395 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 354 transitions. Word has length 20 [2021-06-05 14:47:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:58,395 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 354 transitions. [2021-06-05 14:47:58,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 354 transitions. [2021-06-05 14:47:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:47:58,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:58,395 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:58,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32714,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:58,596 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash 332775831, now seen corresponding path program 599 times [2021-06-05 14:47:58,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:58,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161948138] [2021-06-05 14:47:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:58,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:58,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161948138] [2021-06-05 14:47:58,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161948138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:58,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860932827] [2021-06-05 14:47:58,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:58,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:47:58,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:47:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:59,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:59,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:59,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:47:59,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:59,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:59,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:59,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:59,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:47:59,632 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:47:59,638 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:59,642 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:59,646 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:59,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:47:59,649 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,715 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:47:59,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:47:59,719 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:47:59,722 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:47:59,725 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:59,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:59,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:59,751 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:47:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:59,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860932827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:59,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:59,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:47:59,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856112045] [2021-06-05 14:47:59,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:59,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:59,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:59,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:59,862 INFO L87 Difference]: Start difference. First operand 168 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:00,308 INFO L93 Difference]: Finished difference Result 197 states and 408 transitions. [2021-06-05 14:48:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:48:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:00,309 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:48:00,309 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:48:00,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:48:00,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2021-06-05 14:48:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 14:48:00,310 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 14:48:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:00,310 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 14:48:00,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 14:48:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:00,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:00,311 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:00,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32882 [2021-06-05 14:48:00,511 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:00,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1640147237, now seen corresponding path program 600 times [2021-06-05 14:48:00,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:00,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530283483] [2021-06-05 14:48:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:00,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:00,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530283483] [2021-06-05 14:48:00,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530283483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:00,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261006249] [2021-06-05 14:48:00,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:00,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:48:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:01,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:01,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:01,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:01,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:01,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:48:01,567 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,577 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,581 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:01,587 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,591 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:01,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:01,596 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,599 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,603 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:01,606 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,666 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:48:01,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:01,669 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:01,673 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:01,676 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:01,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:01,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:01,701 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:48:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:01,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261006249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:01,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:01,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:01,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051732681] [2021-06-05 14:48:01,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:01,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:01,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:01,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:01,813 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:02,243 INFO L93 Difference]: Finished difference Result 196 states and 402 transitions. [2021-06-05 14:48:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:48:02,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:02,244 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:48:02,244 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:48:02,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:48:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 171. [2021-06-05 14:48:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 14:48:02,245 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 14:48:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:02,245 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 14:48:02,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 14:48:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:02,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:02,246 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:02,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33073,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:02,446 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2119431913, now seen corresponding path program 601 times [2021-06-05 14:48:02,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:02,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662877962] [2021-06-05 14:48:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:02,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:02,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662877962] [2021-06-05 14:48:02,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662877962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:02,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397785812] [2021-06-05 14:48:02,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:04,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:04,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:48:04,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:04,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:04,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:04,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:04,228 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:04,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,239 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,244 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,249 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,254 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,258 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:48:04,264 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:48:04,269 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,274 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,278 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:04,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:04,283 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,287 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:04,291 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,431 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:48:04,431 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:48:04,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:04,435 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:04,439 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:04,443 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:04,447 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:04,451 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:04,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:04,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:04,509 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:48:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397785812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:04,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:04,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638169876] [2021-06-05 14:48:04,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:04,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:04,728 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:05,127 INFO L93 Difference]: Finished difference Result 193 states and 400 transitions. [2021-06-05 14:48:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:48:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:05,128 INFO L225 Difference]: With dead ends: 193 [2021-06-05 14:48:05,128 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:48:05,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:48:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2021-06-05 14:48:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.119047619047619) internal successors, (356), 168 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 356 transitions. [2021-06-05 14:48:05,129 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 356 transitions. Word has length 20 [2021-06-05 14:48:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:05,129 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 356 transitions. [2021-06-05 14:48:05,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 356 transitions. [2021-06-05 14:48:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:05,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:05,130 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:05,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33251,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:05,330 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:05,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1052401915, now seen corresponding path program 602 times [2021-06-05 14:48:05,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:05,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295147942] [2021-06-05 14:48:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:05,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:05,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295147942] [2021-06-05 14:48:05,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295147942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:05,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621192846] [2021-06-05 14:48:05,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:05,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:05,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:05,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:05,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:05,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:05,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:05,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:05,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:05,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:05,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:05,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:05,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:05,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:05,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:05,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:05,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:05,912 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:48:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:05,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621192846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:05,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:05,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:05,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598549953] [2021-06-05 14:48:05,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:05,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:05,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:05,989 INFO L87 Difference]: Start difference. First operand 169 states and 356 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:06,338 INFO L93 Difference]: Finished difference Result 194 states and 402 transitions. [2021-06-05 14:48:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:48:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:06,338 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:48:06,338 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 14:48:06,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 14:48:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 171. [2021-06-05 14:48:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 14:48:06,340 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 14:48:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:06,340 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 14:48:06,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 14:48:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:06,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:06,340 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:06,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33412 [2021-06-05 14:48:06,540 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1531686591, now seen corresponding path program 603 times [2021-06-05 14:48:06,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:06,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933199424] [2021-06-05 14:48:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:06,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:06,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933199424] [2021-06-05 14:48:06,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933199424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894293313] [2021-06-05 14:48:06,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:06,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:48:06,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:06,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:07,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:07,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:07,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:07,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:07,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:07,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:07,147 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:07,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:07,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:07,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:07,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:48:07,193 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:48:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894293313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:07,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:07,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:07,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801406040] [2021-06-05 14:48:07,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:07,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:07,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:07,334 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,839 INFO L93 Difference]: Finished difference Result 212 states and 426 transitions. [2021-06-05 14:48:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:48:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,840 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:48:07,840 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 14:48:07,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 14:48:07,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 170. [2021-06-05 14:48:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 14:48:07,841 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 14:48:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:07,842 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 14:48:07,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 14:48:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:07,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:07,842 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:08,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33430,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:08,042 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:08,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2066916393, now seen corresponding path program 604 times [2021-06-05 14:48:08,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:08,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847032417] [2021-06-05 14:48:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:08,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847032417] [2021-06-05 14:48:08,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847032417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:08,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002429894] [2021-06-05 14:48:08,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:08,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:08,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:08,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:08,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:08,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:08,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:08,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:08,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:08,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:08,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:08,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:08,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:08,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:48:08,685 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:48:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002429894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:08,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:08,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:08,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161152586] [2021-06-05 14:48:08,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:08,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:08,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:08,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:08,821 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:09,463 INFO L93 Difference]: Finished difference Result 199 states and 414 transitions. [2021-06-05 14:48:09,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:48:09,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:09,463 INFO L225 Difference]: With dead ends: 199 [2021-06-05 14:48:09,463 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 14:48:09,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:48:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 14:48:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-06-05 14:48:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.119047619047619) internal successors, (356), 168 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 356 transitions. [2021-06-05 14:48:09,465 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 356 transitions. Word has length 20 [2021-06-05 14:48:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:09,465 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 356 transitions. [2021-06-05 14:48:09,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 356 transitions. [2021-06-05 14:48:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:09,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:09,465 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:09,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33454 [2021-06-05 14:48:09,666 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1779652799, now seen corresponding path program 605 times [2021-06-05 14:48:09,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:09,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270341619] [2021-06-05 14:48:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:09,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270341619] [2021-06-05 14:48:09,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270341619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:09,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137564521] [2021-06-05 14:48:09,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:10,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:48:10,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:10,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:10,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:10,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:10,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,864 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:10,875 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:48:10,880 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,884 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,887 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:10,892 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,896 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:10,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:10,900 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:10,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,963 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:48:10,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:10,967 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:10,970 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:10,973 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:10,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:10,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:10,998 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:48:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:11,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137564521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:11,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:11,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938657534] [2021-06-05 14:48:11,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:11,109 INFO L87 Difference]: Start difference. First operand 169 states and 356 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:11,424 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 14:48:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:11,530 INFO L93 Difference]: Finished difference Result 199 states and 412 transitions. [2021-06-05 14:48:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:48:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:11,531 INFO L225 Difference]: With dead ends: 199 [2021-06-05 14:48:11,531 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:48:11,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:48:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2021-06-05 14:48:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 14:48:11,532 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 14:48:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:11,532 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 14:48:11,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 14:48:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:11,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:11,533 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:11,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33489 [2021-06-05 14:48:11,733 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash 542391429, now seen corresponding path program 606 times [2021-06-05 14:48:11,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:11,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350279091] [2021-06-05 14:48:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:11,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350279091] [2021-06-05 14:48:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350279091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976784112] [2021-06-05 14:48:11,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:12,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:48:12,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:12,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:12,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:12,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:12,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:12,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:12,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:12,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:12,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:12,806 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:12,809 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:12,813 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:12,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:12,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:12,821 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,882 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:48:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:12,886 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:12,889 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:12,892 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:12,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:12,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:12,918 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:48:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:13,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976784112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:13,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:13,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:13,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710766515] [2021-06-05 14:48:13,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:13,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:13,005 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:13,427 INFO L93 Difference]: Finished difference Result 198 states and 406 transitions. [2021-06-05 14:48:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:48:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:13,427 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:48:13,427 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 14:48:13,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 14:48:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2021-06-05 14:48:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.116279069767442) internal successors, (364), 172 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 364 transitions. [2021-06-05 14:48:13,429 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 364 transitions. Word has length 20 [2021-06-05 14:48:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:13,429 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 364 transitions. [2021-06-05 14:48:13,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 364 transitions. [2021-06-05 14:48:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:13,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:13,429 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:13,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33642 [2021-06-05 14:48:13,642 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash 63106753, now seen corresponding path program 607 times [2021-06-05 14:48:13,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:13,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152847747] [2021-06-05 14:48:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:13,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:13,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152847747] [2021-06-05 14:48:13,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152847747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:13,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465361742] [2021-06-05 14:48:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:13,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:14,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:48:14,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:48:14,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:14,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:14,867 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:14,874 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:48:14,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:14,886 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,891 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:14,896 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,901 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,906 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,911 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:14,917 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,921 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:14,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:14,927 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,931 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:14,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:14,935 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:15,085 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:48:15,086 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:48:15,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:15,091 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:15,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:15,096 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:15,108 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:15,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:15,113 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:15,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:15,117 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:15,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:15,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:15,180 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:48:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:15,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465361742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:15,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:15,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757010684] [2021-06-05 14:48:15,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:15,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:15,415 INFO L87 Difference]: Start difference. First operand 173 states and 364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:16,420 INFO L93 Difference]: Finished difference Result 263 states and 525 transitions. [2021-06-05 14:48:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:48:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:16,420 INFO L225 Difference]: With dead ends: 263 [2021-06-05 14:48:16,420 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 14:48:16,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1246.3ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:48:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 14:48:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 171. [2021-06-05 14:48:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-06-05 14:48:16,422 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-06-05 14:48:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:16,422 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-06-05 14:48:16,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-06-05 14:48:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:16,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:16,423 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:16,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33811 [2021-06-05 14:48:16,637 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1130136751, now seen corresponding path program 608 times [2021-06-05 14:48:16,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:16,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867468] [2021-06-05 14:48:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:16,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:16,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867468] [2021-06-05 14:48:16,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:16,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673388215] [2021-06-05 14:48:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:16,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:17,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:17,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:17,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:17,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:17,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:17,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:17,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:17,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:17,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:17,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:17,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:17,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:17,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:17,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:17,246 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:48:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:17,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673388215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:17,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:17,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:17,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874121613] [2021-06-05 14:48:17,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:17,323 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:17,700 INFO L93 Difference]: Finished difference Result 196 states and 406 transitions. [2021-06-05 14:48:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:48:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:17,700 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:48:17,700 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:48:17,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 533.0ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:48:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2021-06-05 14:48:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.116279069767442) internal successors, (364), 172 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 364 transitions. [2021-06-05 14:48:17,702 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 364 transitions. Word has length 20 [2021-06-05 14:48:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:17,702 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 364 transitions. [2021-06-05 14:48:17,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 364 transitions. [2021-06-05 14:48:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:17,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:17,702 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:17,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34046 [2021-06-05 14:48:17,903 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash 650852075, now seen corresponding path program 609 times [2021-06-05 14:48:17,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:17,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391750527] [2021-06-05 14:48:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:18,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391750527] [2021-06-05 14:48:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391750527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366681139] [2021-06-05 14:48:18,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:18,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:48:18,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:18,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:18,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:18,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:18,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:18,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:18,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:18,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:18,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:18,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:18,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:18,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:48:18,580 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:48:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:18,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366681139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:18,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:18,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:18,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370407247] [2021-06-05 14:48:18,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:18,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:18,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:18,725 INFO L87 Difference]: Start difference. First operand 173 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:19,401 INFO L93 Difference]: Finished difference Result 236 states and 475 transitions. [2021-06-05 14:48:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:48:19,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:19,402 INFO L225 Difference]: With dead ends: 236 [2021-06-05 14:48:19,402 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 14:48:19,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:48:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 14:48:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2021-06-05 14:48:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 14:48:19,404 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 14:48:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:19,404 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 14:48:19,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 14:48:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:19,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:19,404 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:19,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34068,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:19,604 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash 115622273, now seen corresponding path program 610 times [2021-06-05 14:48:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:19,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155592784] [2021-06-05 14:48:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:19,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:19,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155592784] [2021-06-05 14:48:19,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155592784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:19,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852075459] [2021-06-05 14:48:19,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:19,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:20,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:20,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:20,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:20,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:20,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:20,129 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:20,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:20,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:20,202 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:20,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:20,215 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:20,219 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:20,222 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:20,225 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:20,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:20,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:48:20,284 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:201, output treesize:121 [2021-06-05 14:48:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:20,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852075459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:20,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:20,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:20,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035878241] [2021-06-05 14:48:20,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:20,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:20,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:20,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:20,460 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:21,077 INFO L93 Difference]: Finished difference Result 201 states and 418 transitions. [2021-06-05 14:48:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:48:21,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:21,078 INFO L225 Difference]: With dead ends: 201 [2021-06-05 14:48:21,078 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:48:21,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 732.2ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:48:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:48:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2021-06-05 14:48:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1183431952662723) internal successors, (358), 169 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 358 transitions. [2021-06-05 14:48:21,080 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 358 transitions. Word has length 20 [2021-06-05 14:48:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:21,080 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 358 transitions. [2021-06-05 14:48:21,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 358 transitions. [2021-06-05 14:48:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:21,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:21,080 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:21,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34103 [2021-06-05 14:48:21,280 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2124594747, now seen corresponding path program 611 times [2021-06-05 14:48:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:21,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020554411] [2021-06-05 14:48:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:21,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020554411] [2021-06-05 14:48:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020554411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710742301] [2021-06-05 14:48:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:21,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:48:21,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:21,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:21,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:21,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:21,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:21,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:21,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:21,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:21,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:21,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:21,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:21,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:21,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:21,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:21,880 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:21,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:21,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:21,901 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:48:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:21,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710742301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:21,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:21,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:21,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350727477] [2021-06-05 14:48:21,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:21,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:21,979 INFO L87 Difference]: Start difference. First operand 170 states and 358 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:22,336 INFO L93 Difference]: Finished difference Result 196 states and 406 transitions. [2021-06-05 14:48:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:48:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:22,337 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:48:22,337 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:48:22,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:48:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2021-06-05 14:48:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.116279069767442) internal successors, (364), 172 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 364 transitions. [2021-06-05 14:48:22,338 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 364 transitions. Word has length 20 [2021-06-05 14:48:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:22,338 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 364 transitions. [2021-06-05 14:48:22,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 364 transitions. [2021-06-05 14:48:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:22,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:22,339 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:22,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34130 [2021-06-05 14:48:22,539 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1691087873, now seen corresponding path program 612 times [2021-06-05 14:48:22,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:22,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321319793] [2021-06-05 14:48:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:22,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:22,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321319793] [2021-06-05 14:48:22,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321319793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:22,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038054660] [2021-06-05 14:48:22,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:22,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:48:22,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:22,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:22,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:23,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:23,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:23,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:23,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:23,184 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:23,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:23,231 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:23,235 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:23,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:23,241 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:23,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:23,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:48:23,280 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:48:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:23,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038054660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:23,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:23,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:23,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20353668] [2021-06-05 14:48:23,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:23,417 INFO L87 Difference]: Start difference. First operand 173 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:23,967 INFO L93 Difference]: Finished difference Result 214 states and 430 transitions. [2021-06-05 14:48:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:48:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:23,967 INFO L225 Difference]: With dead ends: 214 [2021-06-05 14:48:23,967 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:48:23,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 797.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:48:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 172. [2021-06-05 14:48:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 14:48:23,969 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 14:48:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:23,969 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 14:48:23,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 14:48:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:23,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:23,970 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:24,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34156 [2021-06-05 14:48:24,187 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1155858071, now seen corresponding path program 613 times [2021-06-05 14:48:24,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:24,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846520894] [2021-06-05 14:48:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:24,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:24,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846520894] [2021-06-05 14:48:24,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846520894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:24,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493240935] [2021-06-05 14:48:24,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:24,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:24,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:24,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:24,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:24,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:24,746 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:24,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:24,754 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,898 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 14:48:24,898 INFO L628 ElimStorePlain]: treesize reduction 30, result has 84.8 percent of original size [2021-06-05 14:48:24,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:24,902 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:24,905 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:24,909 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:24,913 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:24,916 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:24,919 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:24,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:24,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:48:24,981 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-06-05 14:48:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:25,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493240935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:25,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:25,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628058656] [2021-06-05 14:48:25,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:25,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:25,169 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:25,967 INFO L93 Difference]: Finished difference Result 246 states and 491 transitions. [2021-06-05 14:48:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:48:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:25,967 INFO L225 Difference]: With dead ends: 246 [2021-06-05 14:48:25,967 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:48:25,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 997.1ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:48:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:48:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2021-06-05 14:48:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 171 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 362 transitions. [2021-06-05 14:48:25,969 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 362 transitions. Word has length 20 [2021-06-05 14:48:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:25,969 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 362 transitions. [2021-06-05 14:48:25,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 362 transitions. [2021-06-05 14:48:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:25,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:25,970 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:26,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34186,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:26,170 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1743603393, now seen corresponding path program 614 times [2021-06-05 14:48:26,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:26,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399961691] [2021-06-05 14:48:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:26,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:26,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399961691] [2021-06-05 14:48:26,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399961691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:26,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780059902] [2021-06-05 14:48:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:26,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:26,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:26,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:27,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:27,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:27,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:27,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,342 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,352 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:27,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:27,363 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:48:27,368 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,373 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,377 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,381 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:27,386 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:27,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:27,391 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:27,395 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,492 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:48:27,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:27,496 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:27,500 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:27,503 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:27,507 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:27,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:27,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:48:27,547 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:48:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:27,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780059902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:27,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:27,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:27,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052072407] [2021-06-05 14:48:27,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:27,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:27,697 INFO L87 Difference]: Start difference. First operand 172 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:27,876 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 14:48:28,045 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 14:48:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:28,651 INFO L93 Difference]: Finished difference Result 232 states and 471 transitions. [2021-06-05 14:48:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:48:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:28,652 INFO L225 Difference]: With dead ends: 232 [2021-06-05 14:48:28,652 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:48:28,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:48:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:48:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 173. [2021-06-05 14:48:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.122093023255814) internal successors, (365), 172 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 365 transitions. [2021-06-05 14:48:28,653 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 365 transitions. Word has length 20 [2021-06-05 14:48:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:28,653 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 365 transitions. [2021-06-05 14:48:28,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 365 transitions. [2021-06-05 14:48:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:28,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:28,654 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:28,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34211 [2021-06-05 14:48:28,854 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1799230575, now seen corresponding path program 615 times [2021-06-05 14:48:28,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:28,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693706220] [2021-06-05 14:48:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:29,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:29,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693706220] [2021-06-05 14:48:29,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693706220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:29,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115902682] [2021-06-05 14:48:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:29,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:48:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:29,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:29,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:29,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:29,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:29,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:29,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:29,819 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:29,823 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:29,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:29,830 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:29,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:29,839 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:29,843 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,901 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:48:29,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:29,905 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:29,908 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:29,911 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:29,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:29,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:29,932 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:48:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:30,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115902682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:30,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:30,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:48:30,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771473758] [2021-06-05 14:48:30,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:48:30,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:48:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:48:30,012 INFO L87 Difference]: Start difference. First operand 173 states and 365 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:30,365 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 14:48:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:30,513 INFO L93 Difference]: Finished difference Result 208 states and 431 transitions. [2021-06-05 14:48:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:48:30,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:30,514 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:48:30,514 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:48:30,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:48:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:48:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 177. [2021-06-05 14:48:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1193181818181817) internal successors, (373), 176 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 373 transitions. [2021-06-05 14:48:30,515 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 373 transitions. Word has length 20 [2021-06-05 14:48:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:30,515 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 373 transitions. [2021-06-05 14:48:30,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 373 transitions. [2021-06-05 14:48:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:30,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:30,516 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:30,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34483,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:30,724 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash 768157611, now seen corresponding path program 616 times [2021-06-05 14:48:30,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:30,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456038998] [2021-06-05 14:48:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:30,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:30,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456038998] [2021-06-05 14:48:30,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456038998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:30,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517998136] [2021-06-05 14:48:30,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:31,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:31,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:31,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:31,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:31,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:31,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:31,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:31,816 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:31,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:31,824 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:31,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:31,832 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:31,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:31,840 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:31,844 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,897 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:48:31,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:31,900 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:31,903 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:31,906 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:31,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:31,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:31,928 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:48:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:32,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517998136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:32,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:32,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:48:32,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839446885] [2021-06-05 14:48:32,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:48:32,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:48:32,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:48:32,014 INFO L87 Difference]: Start difference. First operand 177 states and 373 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,396 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:48:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:32,513 INFO L93 Difference]: Finished difference Result 205 states and 425 transitions. [2021-06-05 14:48:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:48:32,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:32,514 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:48:32,514 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:48:32,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 707.5ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:48:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:48:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2021-06-05 14:48:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 14:48:32,515 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 14:48:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:32,515 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 14:48:32,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 14:48:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:32,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:32,516 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:32,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34587 [2021-06-05 14:48:32,716 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:32,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1204765457, now seen corresponding path program 617 times [2021-06-05 14:48:32,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:32,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29674191] [2021-06-05 14:48:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:32,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:32,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29674191] [2021-06-05 14:48:32,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29674191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:32,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432022212] [2021-06-05 14:48:32,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:33,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:48:33,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:33,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:33,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:33,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:33,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:33,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:33,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:33,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:33,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:33,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:33,892 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:33,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:33,900 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:33,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:33,908 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:33,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:33,912 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,965 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:48:33,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:33,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:33,971 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:33,974 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:33,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:33,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:33,996 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:48:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:34,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432022212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:34,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:34,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:48:34,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059606010] [2021-06-05 14:48:34,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:48:34,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:48:34,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:48:34,078 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:34,658 INFO L93 Difference]: Finished difference Result 208 states and 427 transitions. [2021-06-05 14:48:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:48:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:34,659 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:48:34,659 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:48:34,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:48:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:48:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 179. [2021-06-05 14:48:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.1179775280898876) internal successors, (377), 178 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 377 transitions. [2021-06-05 14:48:34,660 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 377 transitions. Word has length 20 [2021-06-05 14:48:34,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:34,661 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 377 transitions. [2021-06-05 14:48:34,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 377 transitions. [2021-06-05 14:48:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:34,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:34,661 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:34,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34687,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:34,861 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1684050133, now seen corresponding path program 618 times [2021-06-05 14:48:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:34,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826184605] [2021-06-05 14:48:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:35,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826184605] [2021-06-05 14:48:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826184605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239067984] [2021-06-05 14:48:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:35,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:48:35,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:35,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:36,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:36,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:36,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:36,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:48:36,130 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,134 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:36,139 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,143 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:36,148 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:36,153 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:36,158 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:36,162 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,258 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:48:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:36,263 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:36,266 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:36,270 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:36,273 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:36,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:48:36,320 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:48:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:36,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239067984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:36,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:36,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:48:36,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789186854] [2021-06-05 14:48:36,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:48:36,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:48:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:48:36,462 INFO L87 Difference]: Start difference. First operand 179 states and 377 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:36,920 INFO L93 Difference]: Finished difference Result 201 states and 417 transitions. [2021-06-05 14:48:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:48:36,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:36,921 INFO L225 Difference]: With dead ends: 201 [2021-06-05 14:48:36,921 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:48:36,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:48:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:48:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2021-06-05 14:48:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.12) internal successors, (371), 175 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 371 transitions. [2021-06-05 14:48:36,923 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 371 transitions. Word has length 20 [2021-06-05 14:48:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:36,923 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 371 transitions. [2021-06-05 14:48:36,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 371 transitions. [2021-06-05 14:48:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:36,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:36,923 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:37,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34870 [2021-06-05 14:48:37,123 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:37,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1808393409, now seen corresponding path program 619 times [2021-06-05 14:48:37,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:37,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492842290] [2021-06-05 14:48:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:37,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:37,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492842290] [2021-06-05 14:48:37,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492842290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:37,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836083935] [2021-06-05 14:48:37,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:37,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:37,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:38,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:38,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:38,413 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,422 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,426 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,430 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:38,436 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:38,441 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,445 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,449 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:38,454 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:48:38,458 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:38,462 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:38,465 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,525 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:48:38,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:38,529 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:38,532 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:38,535 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:38,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:38,561 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 4 variables, input treesize:787, output treesize:62 [2021-06-05 14:48:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:38,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836083935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:38,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:38,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:38,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605929230] [2021-06-05 14:48:38,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:38,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:38,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:38,677 INFO L87 Difference]: Start difference. First operand 176 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:38,975 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 14:48:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:39,074 INFO L93 Difference]: Finished difference Result 205 states and 425 transitions. [2021-06-05 14:48:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:48:39,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:39,074 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:48:39,074 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:48:39,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:48:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2021-06-05 14:48:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 14:48:39,076 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 14:48:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:39,076 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 14:48:39,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 14:48:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:39,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:39,076 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:39,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35109,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:39,277 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -164529659, now seen corresponding path program 620 times [2021-06-05 14:48:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:39,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42507444] [2021-06-05 14:48:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:39,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42507444] [2021-06-05 14:48:39,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42507444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686546840] [2021-06-05 14:48:39,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:39,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:40,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:40,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:40,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:40,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:40,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:40,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:40,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:40,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:40,240 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:40,245 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:40,249 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:40,252 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:40,256 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,317 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:48:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:40,320 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:40,323 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:40,326 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:40,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:40,352 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:48:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:40,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686546840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:40,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:40,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:40,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446760420] [2021-06-05 14:48:40,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:40,462 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:40,883 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:48:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:40,913 INFO L93 Difference]: Finished difference Result 204 states and 419 transitions. [2021-06-05 14:48:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:48:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:40,913 INFO L225 Difference]: With dead ends: 204 [2021-06-05 14:48:40,913 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 14:48:40,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 14:48:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2021-06-05 14:48:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.1179775280898876) internal successors, (377), 178 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 377 transitions. [2021-06-05 14:48:40,915 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 377 transitions. Word has length 20 [2021-06-05 14:48:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:40,915 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 377 transitions. [2021-06-05 14:48:40,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 377 transitions. [2021-06-05 14:48:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:40,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:40,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:41,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35252,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:41,116 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:41,116 INFO L82 PathProgramCache]: Analyzing trace with hash -643814335, now seen corresponding path program 621 times [2021-06-05 14:48:41,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:41,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85346521] [2021-06-05 14:48:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:41,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85346521] [2021-06-05 14:48:41,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85346521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757161855] [2021-06-05 14:48:41,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:41,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:48:41,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:41,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:42,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:42,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:48:42,849 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:42,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:42,867 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:42,878 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:48:42,884 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,890 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,895 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,900 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:42,905 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:48:42,911 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:42,917 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,921 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:42,925 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:42,930 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,074 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 14:48:43,074 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:48:43,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:43,079 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:43,083 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:43,087 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:43,091 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:43,094 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:43,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:43,153 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:48:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:43,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757161855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:43,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:43,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:43,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399660008] [2021-06-05 14:48:43,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:43,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:43,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:43,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:43,367 INFO L87 Difference]: Start difference. First operand 179 states and 377 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:44,393 INFO L93 Difference]: Finished difference Result 269 states and 538 transitions. [2021-06-05 14:48:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:48:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:44,393 INFO L225 Difference]: With dead ends: 269 [2021-06-05 14:48:44,393 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 14:48:44,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1231.3ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:48:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 14:48:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 177. [2021-06-05 14:48:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1193181818181817) internal successors, (373), 176 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 373 transitions. [2021-06-05 14:48:44,395 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 373 transitions. Word has length 20 [2021-06-05 14:48:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:44,395 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 373 transitions. [2021-06-05 14:48:44,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 373 transitions. [2021-06-05 14:48:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:44,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:44,396 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:44,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35360,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:44,596 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:44,596 INFO L82 PathProgramCache]: Analyzing trace with hash 423215663, now seen corresponding path program 622 times [2021-06-05 14:48:44,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:44,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683460541] [2021-06-05 14:48:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:44,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:44,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683460541] [2021-06-05 14:48:44,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683460541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:44,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479867794] [2021-06-05 14:48:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:44,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:44,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:44,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:45,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:45,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:45,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:45,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:45,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:45,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:45,252 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:45,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:45,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:45,275 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:48:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:45,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479867794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:45,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:45,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:45,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792147967] [2021-06-05 14:48:45,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:45,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:45,357 INFO L87 Difference]: Start difference. First operand 177 states and 373 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:45,730 INFO L93 Difference]: Finished difference Result 202 states and 419 transitions. [2021-06-05 14:48:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:48:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:45,731 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:48:45,731 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:48:45,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:48:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2021-06-05 14:48:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.1179775280898876) internal successors, (377), 178 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 377 transitions. [2021-06-05 14:48:45,732 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 377 transitions. Word has length 20 [2021-06-05 14:48:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:45,733 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 377 transitions. [2021-06-05 14:48:45,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 377 transitions. [2021-06-05 14:48:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:45,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:45,733 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:45,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35521 [2021-06-05 14:48:45,933 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash -56069013, now seen corresponding path program 623 times [2021-06-05 14:48:45,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:45,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175517723] [2021-06-05 14:48:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:46,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:46,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175517723] [2021-06-05 14:48:46,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175517723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:46,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055359849] [2021-06-05 14:48:46,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:46,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:48:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:46,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:46,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:46,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:46,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:46,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:46,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:46,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:46,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:46,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:46,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:46,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:46,539 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:46,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:46,588 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:48:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:46,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055359849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:46,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:46,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:46,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338407998] [2021-06-05 14:48:46,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:46,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:46,760 INFO L87 Difference]: Start difference. First operand 179 states and 377 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:47,372 INFO L93 Difference]: Finished difference Result 242 states and 488 transitions. [2021-06-05 14:48:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:48:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:47,373 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:48:47,373 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 14:48:47,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:48:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 14:48:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 178. [2021-06-05 14:48:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 14:48:47,374 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 14:48:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:47,374 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 14:48:47,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 14:48:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:47,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:47,375 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:47,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35557 [2021-06-05 14:48:47,575 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:47,575 INFO L82 PathProgramCache]: Analyzing trace with hash -591298815, now seen corresponding path program 624 times [2021-06-05 14:48:47,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:47,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681465314] [2021-06-05 14:48:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:47,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681465314] [2021-06-05 14:48:47,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681465314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077416786] [2021-06-05 14:48:47,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:47,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:48:47,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:47,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:47,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:48,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:48,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:48,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:48,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:48,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:48,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:48,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:48,200 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:48,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:48,207 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:48,210 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:48,213 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:48,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:48,260 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:48:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:48,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077416786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:48,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:48,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:48,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490640109] [2021-06-05 14:48:48,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:48,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:48,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:48,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:48,432 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:49,054 INFO L93 Difference]: Finished difference Result 254 states and 508 transitions. [2021-06-05 14:48:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:48:49,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:49,054 INFO L225 Difference]: With dead ends: 254 [2021-06-05 14:48:49,054 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 14:48:49,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:48:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 14:48:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2021-06-05 14:48:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1186440677966103) internal successors, (375), 177 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 375 transitions. [2021-06-05 14:48:49,056 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 375 transitions. Word has length 20 [2021-06-05 14:48:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:49,056 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 375 transitions. [2021-06-05 14:48:49,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 375 transitions. [2021-06-05 14:48:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:49,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:49,057 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:49,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35581,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:49,257 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:49,257 INFO L82 PathProgramCache]: Analyzing trace with hash -304035221, now seen corresponding path program 625 times [2021-06-05 14:48:49,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:49,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571152915] [2021-06-05 14:48:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:49,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:49,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571152915] [2021-06-05 14:48:49,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571152915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:49,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53432115] [2021-06-05 14:48:49,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:50,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:50,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:50,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:50,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:50,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:50,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:50,367 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:50,372 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:50,376 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:50,380 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:50,383 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:50,387 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:50,390 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,451 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:48:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:50,455 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:50,458 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:50,461 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:50,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:50,487 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:48:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:50,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53432115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:50,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:50,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:50,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977163870] [2021-06-05 14:48:50,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:50,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:50,599 INFO L87 Difference]: Start difference. First operand 178 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:50,939 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:48:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:51,071 INFO L93 Difference]: Finished difference Result 208 states and 431 transitions. [2021-06-05 14:48:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:48:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:51,071 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:48:51,071 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 14:48:51,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 681.7ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 14:48:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-06-05 14:48:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1166666666666667) internal successors, (381), 180 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 381 transitions. [2021-06-05 14:48:51,073 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 381 transitions. Word has length 20 [2021-06-05 14:48:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:51,073 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 381 transitions. [2021-06-05 14:48:51,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 381 transitions. [2021-06-05 14:48:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:51,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:51,073 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:51,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35606,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:51,274 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2018009007, now seen corresponding path program 626 times [2021-06-05 14:48:51,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:51,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326229742] [2021-06-05 14:48:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:51,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:51,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326229742] [2021-06-05 14:48:51,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326229742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487325638] [2021-06-05 14:48:51,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:51,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:51,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:52,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:52,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:52,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:52,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:52,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:52,314 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:52,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:52,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:52,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:52,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:52,341 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:52,345 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:52,348 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,409 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:48:52,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:52,413 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:52,416 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:52,419 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:52,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:52,445 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:48:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:52,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487325638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:52,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:52,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:52,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920794812] [2021-06-05 14:48:52,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:52,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:52,557 INFO L87 Difference]: Start difference. First operand 181 states and 381 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,996 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 14:48:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:53,026 INFO L93 Difference]: Finished difference Result 207 states and 425 transitions. [2021-06-05 14:48:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:48:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:53,027 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:48:53,027 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:48:53,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:48:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2021-06-05 14:48:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 14:48:53,029 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 14:48:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:53,029 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 14:48:53,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 14:48:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:53,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:53,029 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:53,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35791,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:53,229 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1538724331, now seen corresponding path program 627 times [2021-06-05 14:48:53,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:53,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796775839] [2021-06-05 14:48:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:53,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:53,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796775839] [2021-06-05 14:48:53,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796775839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:53,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668285683] [2021-06-05 14:48:53,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:53,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:48:53,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:54,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:54,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:48:54,370 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:54,376 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,381 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:48:54,387 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:54,393 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:48:54,398 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,403 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:48:54,409 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:54,413 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:48:54,418 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:48:54,423 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:48:54,427 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,567 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:48:54,568 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:48:54,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:54,572 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:54,576 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:54,580 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:54,584 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:54,588 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:54,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:54,649 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:48:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:54,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668285683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:54,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:54,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:48:54,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363526423] [2021-06-05 14:48:54,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:48:54,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:48:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:54,867 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:55,262 INFO L93 Difference]: Finished difference Result 204 states and 423 transitions. [2021-06-05 14:48:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:48:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:55,262 INFO L225 Difference]: With dead ends: 204 [2021-06-05 14:48:55,262 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 14:48:55,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 749.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:48:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 14:48:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2021-06-05 14:48:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.11731843575419) internal successors, (379), 179 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 379 transitions. [2021-06-05 14:48:55,264 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 379 transitions. Word has length 20 [2021-06-05 14:48:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:55,264 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 379 transitions. [2021-06-05 14:48:55,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 379 transitions. [2021-06-05 14:48:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:55,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:55,264 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:55,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35937,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:55,465 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1689212967, now seen corresponding path program 628 times [2021-06-05 14:48:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:55,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782231917] [2021-06-05 14:48:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:55,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:55,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782231917] [2021-06-05 14:48:55,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782231917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:55,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343870991] [2021-06-05 14:48:55,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:55,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:55,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:56,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:56,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:56,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:56,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:56,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:56,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:56,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:56,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:56,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:56,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:56,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:56,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:56,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:56,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:56,067 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:48:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:56,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343870991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:56,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:56,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:56,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522421097] [2021-06-05 14:48:56,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:56,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:56,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:56,142 INFO L87 Difference]: Start difference. First operand 180 states and 379 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:56,386 INFO L93 Difference]: Finished difference Result 202 states and 415 transitions. [2021-06-05 14:48:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:48:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:56,387 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:48:56,387 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:48:56,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:48:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:48:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2021-06-05 14:48:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 14:48:56,388 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 14:48:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:56,388 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 14:48:56,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 14:48:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:56,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:56,389 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:56,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36046,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:56,589 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2126469653, now seen corresponding path program 629 times [2021-06-05 14:48:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060226318] [2021-06-05 14:48:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:56,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:56,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060226318] [2021-06-05 14:48:56,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060226318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:56,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098135806] [2021-06-05 14:48:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:56,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:48:56,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:57,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:57,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:57,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:57,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:57,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:57,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:57,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:57,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:57,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:57,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:57,277 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:57,280 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:57,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:57,334 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:48:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:57,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098135806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:57,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:57,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:57,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324686260] [2021-06-05 14:48:57,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:57,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:57,503 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:57,772 INFO L93 Difference]: Finished difference Result 197 states and 406 transitions. [2021-06-05 14:48:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:48:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:57,772 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:48:57,772 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 14:48:57,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 14:48:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-06-05 14:48:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1166666666666667) internal successors, (381), 180 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 381 transitions. [2021-06-05 14:48:57,774 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 381 transitions. Word has length 20 [2021-06-05 14:48:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:57,774 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 381 transitions. [2021-06-05 14:48:57,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 381 transitions. [2021-06-05 14:48:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:57,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:57,774 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:57,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36068,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:57,975 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1591239851, now seen corresponding path program 630 times [2021-06-05 14:48:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:57,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424196119] [2021-06-05 14:48:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:58,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424196119] [2021-06-05 14:48:58,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424196119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792340936] [2021-06-05 14:48:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:58,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:48:58,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:58,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:58,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:58,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:58,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:58,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:58,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:58,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:48:58,644 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:58,648 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:48:58,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:48:58,654 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:48:58,658 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:58,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:48:58,705 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:48:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792340936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:58,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:58,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:48:58,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232638275] [2021-06-05 14:48:58,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:48:58,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:48:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:58,882 INFO L87 Difference]: Start difference. First operand 181 states and 381 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:59,403 INFO L93 Difference]: Finished difference Result 210 states and 437 transitions. [2021-06-05 14:48:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:48:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:48:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:59,403 INFO L225 Difference]: With dead ends: 210 [2021-06-05 14:48:59,403 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:48:59,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 769.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:48:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:48:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2021-06-05 14:48:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.11731843575419) internal successors, (379), 179 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 379 transitions. [2021-06-05 14:48:59,405 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 379 transitions. Word has length 20 [2021-06-05 14:48:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:59,405 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 379 transitions. [2021-06-05 14:48:59,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 379 transitions. [2021-06-05 14:48:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:48:59,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:59,405 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:59,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36106 [2021-06-05 14:48:59,606 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:59,606 INFO L82 PathProgramCache]: Analyzing trace with hash -648977169, now seen corresponding path program 631 times [2021-06-05 14:48:59,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:59,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944412580] [2021-06-05 14:48:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:59,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944412580] [2021-06-05 14:48:59,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944412580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633295288] [2021-06-05 14:48:59,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:48:59,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:00,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:00,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:00,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:00,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:00,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:00,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:00,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:00,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:00,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:00,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:00,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:00,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:00,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:00,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:00,243 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:49:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:00,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633295288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:00,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:00,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:00,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124215551] [2021-06-05 14:49:00,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:00,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:00,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:00,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:00,326 INFO L87 Difference]: Start difference. First operand 180 states and 379 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:00,697 INFO L93 Difference]: Finished difference Result 206 states and 427 transitions. [2021-06-05 14:49:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:49:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:00,698 INFO L225 Difference]: With dead ends: 206 [2021-06-05 14:49:00,698 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 14:49:00,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:49:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 14:49:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2021-06-05 14:49:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.1153846153846154) internal successors, (385), 182 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 385 transitions. [2021-06-05 14:49:00,700 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 385 transitions. Word has length 20 [2021-06-05 14:49:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:00,700 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 385 transitions. [2021-06-05 14:49:00,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 385 transitions. [2021-06-05 14:49:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:00,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:00,700 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:00,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36141,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:00,900 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:00,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1128261845, now seen corresponding path program 632 times [2021-06-05 14:49:00,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:00,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816025396] [2021-06-05 14:49:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:01,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816025396] [2021-06-05 14:49:01,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816025396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435790727] [2021-06-05 14:49:01,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:01,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:01,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:01,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:01,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:01,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:01,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:01,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:01,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:01,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:01,504 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:01,507 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:01,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:01,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:01,546 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:49:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435790727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:01,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:01,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:01,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648342611] [2021-06-05 14:49:01,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:01,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:01,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:01,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:01,680 INFO L87 Difference]: Start difference. First operand 183 states and 385 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:02,303 INFO L93 Difference]: Finished difference Result 246 states and 496 transitions. [2021-06-05 14:49:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:49:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:02,303 INFO L225 Difference]: With dead ends: 246 [2021-06-05 14:49:02,303 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:49:02,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 767.5ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:49:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:49:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 182. [2021-06-05 14:49:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 14:49:02,305 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 14:49:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:02,305 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 14:49:02,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 14:49:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:02,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:02,305 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:02,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36164 [2021-06-05 14:49:02,506 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1663491647, now seen corresponding path program 633 times [2021-06-05 14:49:02,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:02,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092720052] [2021-06-05 14:49:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:02,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:02,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092720052] [2021-06-05 14:49:02,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092720052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:02,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823052332] [2021-06-05 14:49:02,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:02,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:49:02,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:03,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:03,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:03,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:03,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:03,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:03,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:03,218 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:03,221 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:03,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:03,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:03,262 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:49:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:03,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823052332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:03,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:03,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:03,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711151613] [2021-06-05 14:49:03,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:03,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:03,401 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:04,186 INFO L93 Difference]: Finished difference Result 238 states and 484 transitions. [2021-06-05 14:49:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:49:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:04,186 INFO L225 Difference]: With dead ends: 238 [2021-06-05 14:49:04,186 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 14:49:04,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:49:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 14:49:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 182. [2021-06-05 14:49:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 14:49:04,188 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 14:49:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:04,188 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 14:49:04,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 14:49:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:04,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:04,189 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:04,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36194,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:04,389 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1075746325, now seen corresponding path program 634 times [2021-06-05 14:49:04,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:04,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622869282] [2021-06-05 14:49:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:04,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622869282] [2021-06-05 14:49:04,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622869282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:04,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197278317] [2021-06-05 14:49:04,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:04,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:04,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:05,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:05,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:05,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:05,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:05,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:05,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,567 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:05,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:05,577 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:05,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:05,583 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,587 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,591 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,595 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:05,599 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,694 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:49:05,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:05,698 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:05,702 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:05,705 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:05,709 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:05,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:05,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:05,748 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:49:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:05,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197278317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:05,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:05,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:05,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134916403] [2021-06-05 14:49:05,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:05,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:05,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:05,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:05,885 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:06,320 INFO L93 Difference]: Finished difference Result 223 states and 458 transitions. [2021-06-05 14:49:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:49:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:06,321 INFO L225 Difference]: With dead ends: 223 [2021-06-05 14:49:06,321 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 14:49:06,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 14:49:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2021-06-05 14:49:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.116022099447514) internal successors, (383), 181 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 383 transitions. [2021-06-05 14:49:06,328 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 383 transitions. Word has length 20 [2021-06-05 14:49:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:06,329 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 383 transitions. [2021-06-05 14:49:06,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 383 transitions. [2021-06-05 14:49:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:06,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:06,329 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:06,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36233,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:06,529 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1364813311, now seen corresponding path program 635 times [2021-06-05 14:49:06,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:06,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379571747] [2021-06-05 14:49:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:06,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:06,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379571747] [2021-06-05 14:49:06,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379571747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:06,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594574223] [2021-06-05 14:49:06,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:06,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:06,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:06,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:07,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:07,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:07,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:07,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:07,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:07,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:07,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:07,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:07,597 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:07,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:07,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:07,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:07,609 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:07,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,673 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:07,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:07,676 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:07,679 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:07,682 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:07,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:07,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:07,708 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:49:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:07,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594574223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:07,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:07,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:49:07,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354578822] [2021-06-05 14:49:07,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:07,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:07,820 INFO L87 Difference]: Start difference. First operand 182 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:08,170 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:49:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:08,287 INFO L93 Difference]: Finished difference Result 213 states and 441 transitions. [2021-06-05 14:49:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:49:08,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:08,288 INFO L225 Difference]: With dead ends: 213 [2021-06-05 14:49:08,288 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:49:08,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 712.3ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:49:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:49:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2021-06-05 14:49:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1135135135135137) internal successors, (391), 185 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 391 transitions. [2021-06-05 14:49:08,290 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 391 transitions. Word has length 20 [2021-06-05 14:49:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:08,290 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 391 transitions. [2021-06-05 14:49:08,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 391 transitions. [2021-06-05 14:49:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:08,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:08,290 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:08,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36357 [2021-06-05 14:49:08,491 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:08,491 INFO L82 PathProgramCache]: Analyzing trace with hash 957230917, now seen corresponding path program 636 times [2021-06-05 14:49:08,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:08,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986378049] [2021-06-05 14:49:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:08,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:08,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986378049] [2021-06-05 14:49:08,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986378049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:08,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548516666] [2021-06-05 14:49:08,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:08,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:49:08,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:08,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:08,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:09,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:09,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:09,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:09,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:09,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:09,670 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:09,675 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:09,680 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:09,684 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:09,688 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:09,692 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:09,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:09,695 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,756 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:09,766 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:09,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:09,772 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:09,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:09,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:09,798 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:49:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:09,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548516666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:09,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:09,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030559393] [2021-06-05 14:49:09,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:09,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:09,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:09,882 INFO L87 Difference]: Start difference. First operand 186 states and 391 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:10,376 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:49:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:10,415 INFO L93 Difference]: Finished difference Result 212 states and 435 transitions. [2021-06-05 14:49:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:49:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:10,415 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:49:10,415 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 14:49:10,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 721.4ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 14:49:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2021-06-05 14:49:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.1129032258064515) internal successors, (393), 186 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 393 transitions. [2021-06-05 14:49:10,417 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 393 transitions. Word has length 20 [2021-06-05 14:49:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:10,417 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 393 transitions. [2021-06-05 14:49:10,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 393 transitions. [2021-06-05 14:49:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:10,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:10,417 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:10,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36500,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:10,617 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:10,618 INFO L82 PathProgramCache]: Analyzing trace with hash 477946241, now seen corresponding path program 637 times [2021-06-05 14:49:10,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:10,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738612463] [2021-06-05 14:49:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:10,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:10,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738612463] [2021-06-05 14:49:10,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738612463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:10,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671227066] [2021-06-05 14:49:10,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:11,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:11,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:11,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:11,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:11,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:11,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:11,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:49:11,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:11,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:11,982 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:11,987 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:11,992 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:11,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:11,996 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:12,003 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:12,008 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:12,013 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:12,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:12,024 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:12,029 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:12,034 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:12,038 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:12,042 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,182 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:49:12,182 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:49:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:12,187 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:12,191 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:12,195 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:12,199 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:12,203 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:12,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:49:12,262 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:49:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:12,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671227066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:12,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:12,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517920150] [2021-06-05 14:49:12,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:12,480 INFO L87 Difference]: Start difference. First operand 187 states and 393 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:13,870 INFO L93 Difference]: Finished difference Result 313 states and 602 transitions. [2021-06-05 14:49:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:49:13,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:13,870 INFO L225 Difference]: With dead ends: 313 [2021-06-05 14:49:13,871 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 14:49:13,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1626.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:49:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 14:49:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 190. [2021-06-05 14:49:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.132275132275132) internal successors, (403), 189 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 403 transitions. [2021-06-05 14:49:13,872 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 403 transitions. Word has length 20 [2021-06-05 14:49:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:13,872 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 403 transitions. [2021-06-05 14:49:13,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 403 transitions. [2021-06-05 14:49:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:13,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:13,873 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:14,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36604 [2021-06-05 14:49:14,073 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1544976239, now seen corresponding path program 638 times [2021-06-05 14:49:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:14,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515019370] [2021-06-05 14:49:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:14,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:14,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515019370] [2021-06-05 14:49:14,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515019370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:14,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501161680] [2021-06-05 14:49:14,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:14,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:14,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:14,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:14,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:14,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:14,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:14,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:14,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:14,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:14,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:14,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:14,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:14,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:14,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:14,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:14,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:14,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:14,706 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:49:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:14,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501161680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:14,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:14,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749501099] [2021-06-05 14:49:14,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:14,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:14,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:14,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:14,782 INFO L87 Difference]: Start difference. First operand 190 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:15,131 INFO L93 Difference]: Finished difference Result 215 states and 449 transitions. [2021-06-05 14:49:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:49:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:15,132 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:49:15,132 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:49:15,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:49:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:49:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2021-06-05 14:49:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.130890052356021) internal successors, (407), 191 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 407 transitions. [2021-06-05 14:49:15,134 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 407 transitions. Word has length 20 [2021-06-05 14:49:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:15,134 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 407 transitions. [2021-06-05 14:49:15,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 407 transitions. [2021-06-05 14:49:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:15,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:15,134 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:15,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36895,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:15,334 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1065691563, now seen corresponding path program 639 times [2021-06-05 14:49:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:15,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100855758] [2021-06-05 14:49:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:15,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:15,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100855758] [2021-06-05 14:49:15,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100855758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:15,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171866188] [2021-06-05 14:49:15,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:15,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:49:15,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:15,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:15,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:15,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:15,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:15,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:15,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:15,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:15,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:15,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:15,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:16,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:16,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:16,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:16,008 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:16,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:16,012 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:16,015 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:16,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:16,018 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:16,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:16,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:49:16,068 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:49:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:16,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171866188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:16,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:16,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:16,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332121694] [2021-06-05 14:49:16,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:16,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:16,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:16,236 INFO L87 Difference]: Start difference. First operand 192 states and 407 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:16,656 INFO L93 Difference]: Finished difference Result 233 states and 473 transitions. [2021-06-05 14:49:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:49:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:16,657 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:49:16,657 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 14:49:16,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 14:49:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-06-05 14:49:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1315789473684212) internal successors, (405), 190 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 405 transitions. [2021-06-05 14:49:16,659 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 405 transitions. Word has length 20 [2021-06-05 14:49:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:16,659 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 405 transitions. [2021-06-05 14:49:16,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 405 transitions. [2021-06-05 14:49:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:16,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:16,659 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:16,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36921 [2021-06-05 14:49:16,859 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:16,860 INFO L82 PathProgramCache]: Analyzing trace with hash 530461761, now seen corresponding path program 640 times [2021-06-05 14:49:16,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:16,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612657286] [2021-06-05 14:49:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:17,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612657286] [2021-06-05 14:49:17,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612657286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433053991] [2021-06-05 14:49:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:17,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:17,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:17,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:17,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:17,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:17,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:17,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:17,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:17,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:17,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:17,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:17,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:17,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:17,557 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:49:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:17,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433053991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:17,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:17,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:17,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792499325] [2021-06-05 14:49:17,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:17,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:17,691 INFO L87 Difference]: Start difference. First operand 191 states and 405 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:18,270 INFO L93 Difference]: Finished difference Result 220 states and 461 transitions. [2021-06-05 14:49:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:49:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:18,271 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:49:18,271 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 14:49:18,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 692.6ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:49:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 14:49:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2021-06-05 14:49:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.132275132275132) internal successors, (403), 189 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 403 transitions. [2021-06-05 14:49:18,273 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 403 transitions. Word has length 20 [2021-06-05 14:49:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:18,273 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 403 transitions. [2021-06-05 14:49:18,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 403 transitions. [2021-06-05 14:49:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:18,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:18,273 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:18,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36949 [2021-06-05 14:49:18,474 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:18,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1709755259, now seen corresponding path program 641 times [2021-06-05 14:49:18,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:18,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860285341] [2021-06-05 14:49:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:18,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:18,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860285341] [2021-06-05 14:49:18,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860285341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:18,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081539648] [2021-06-05 14:49:18,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:18,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:19,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:19,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:19,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:19,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:19,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:19,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:19,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:19,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:19,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:19,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:19,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:19,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:19,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:19,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:19,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:19,115 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:49:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:19,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081539648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:19,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:19,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:19,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051810213] [2021-06-05 14:49:19,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:19,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:19,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:19,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:19,189 INFO L87 Difference]: Start difference. First operand 190 states and 403 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:19,411 INFO L93 Difference]: Finished difference Result 213 states and 441 transitions. [2021-06-05 14:49:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:49:19,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:19,412 INFO L225 Difference]: With dead ends: 213 [2021-06-05 14:49:19,412 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 14:49:19,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 14:49:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 193. [2021-06-05 14:49:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1302083333333335) internal successors, (409), 192 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 409 transitions. [2021-06-05 14:49:19,413 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 409 transitions. Word has length 20 [2021-06-05 14:49:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:19,413 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 409 transitions. [2021-06-05 14:49:19,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 409 transitions. [2021-06-05 14:49:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:19,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:19,414 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:19,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36965,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:19,614 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:19,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2105927361, now seen corresponding path program 642 times [2021-06-05 14:49:19,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:19,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764381508] [2021-06-05 14:49:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:19,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:19,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764381508] [2021-06-05 14:49:19,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764381508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:19,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745809850] [2021-06-05 14:49:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:19,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:49:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:19,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:20,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:20,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:20,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:20,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:20,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:20,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:20,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:20,267 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:20,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:20,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:20,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:20,310 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:49:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:20,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745809850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:20,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:20,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427192451] [2021-06-05 14:49:20,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:20,452 INFO L87 Difference]: Start difference. First operand 193 states and 409 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:21,102 INFO L93 Difference]: Finished difference Result 256 states and 520 transitions. [2021-06-05 14:49:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:49:21,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:21,102 INFO L225 Difference]: With dead ends: 256 [2021-06-05 14:49:21,102 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 14:49:21,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:49:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 14:49:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 192. [2021-06-05 14:49:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.130890052356021) internal successors, (407), 191 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 407 transitions. [2021-06-05 14:49:21,104 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 407 transitions. Word has length 20 [2021-06-05 14:49:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:21,104 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 407 transitions. [2021-06-05 14:49:21,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 407 transitions. [2021-06-05 14:49:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:21,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:21,104 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:21,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36999 [2021-06-05 14:49:21,305 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1570697559, now seen corresponding path program 643 times [2021-06-05 14:49:21,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:21,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392763955] [2021-06-05 14:49:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:21,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:21,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392763955] [2021-06-05 14:49:21,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392763955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:21,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281163181] [2021-06-05 14:49:21,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:21,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:21,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:21,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:21,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:21,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:21,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:21,941 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:21,944 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:21,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:21,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:21,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:21,987 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-06-05 14:49:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:22,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281163181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:22,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:22,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:22,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996914450] [2021-06-05 14:49:22,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:22,127 INFO L87 Difference]: Start difference. First operand 192 states and 407 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:22,876 INFO L93 Difference]: Finished difference Result 248 states and 508 transitions. [2021-06-05 14:49:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:49:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:22,876 INFO L225 Difference]: With dead ends: 248 [2021-06-05 14:49:22,876 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 14:49:22,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 899.5ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:49:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 14:49:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 191. [2021-06-05 14:49:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1315789473684212) internal successors, (405), 190 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 405 transitions. [2021-06-05 14:49:22,878 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 405 transitions. Word has length 20 [2021-06-05 14:49:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:22,878 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 405 transitions. [2021-06-05 14:49:22,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 405 transitions. [2021-06-05 14:49:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:22,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:22,878 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:23,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37037,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:23,079 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2136524415, now seen corresponding path program 644 times [2021-06-05 14:49:23,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:23,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293913675] [2021-06-05 14:49:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:23,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:23,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293913675] [2021-06-05 14:49:23,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293913675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:23,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795596008] [2021-06-05 14:49:23,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:23,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:23,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:24,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:24,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:24,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:24,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,277 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:24,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:24,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:24,294 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:24,304 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,309 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,314 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:24,327 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:24,332 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,336 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:24,340 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:49:24,344 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,472 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 14:49:24,472 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-06-05 14:49:24,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:24,477 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:24,480 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:24,484 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:24,488 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:24,507 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:24,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:49:24,568 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:98 [2021-06-05 14:49:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:24,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795596008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:24,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:24,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:24,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440551494] [2021-06-05 14:49:24,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:24,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:24,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:24,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:24,746 INFO L87 Difference]: Start difference. First operand 191 states and 405 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:25,471 INFO L93 Difference]: Finished difference Result 229 states and 479 transitions. [2021-06-05 14:49:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:49:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:25,472 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:49:25,472 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 14:49:25,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:49:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 14:49:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-06-05 14:49:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.136125654450262) internal successors, (408), 191 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 408 transitions. [2021-06-05 14:49:25,474 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 408 transitions. Word has length 20 [2021-06-05 14:49:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:25,474 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 408 transitions. [2021-06-05 14:49:25,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 408 transitions. [2021-06-05 14:49:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:25,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:25,474 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:25,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37075 [2021-06-05 14:49:25,674 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash 472783407, now seen corresponding path program 645 times [2021-06-05 14:49:25,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:25,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819741684] [2021-06-05 14:49:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:26,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:26,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819741684] [2021-06-05 14:49:26,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819741684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:26,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2390480] [2021-06-05 14:49:26,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:26,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:26,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:26,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:26,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:26,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:26,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:26,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:26,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:26,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:26,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:26,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:26,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:26,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:26,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:26,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:26,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:26,443 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-06-05 14:49:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:26,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2390480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:26,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:26,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:26,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887761214] [2021-06-05 14:49:26,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:26,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:26,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:26,517 INFO L87 Difference]: Start difference. First operand 192 states and 408 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:27,015 INFO L93 Difference]: Finished difference Result 223 states and 465 transitions. [2021-06-05 14:49:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:49:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:27,016 INFO L225 Difference]: With dead ends: 223 [2021-06-05 14:49:27,016 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 14:49:27,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:49:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 14:49:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2021-06-05 14:49:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1333333333333333) internal successors, (416), 195 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 416 transitions. [2021-06-05 14:49:27,017 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 416 transitions. Word has length 20 [2021-06-05 14:49:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:27,017 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 416 transitions. [2021-06-05 14:49:27,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 416 transitions. [2021-06-05 14:49:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:27,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:27,018 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:27,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37308 [2021-06-05 14:49:27,218 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:27,218 INFO L82 PathProgramCache]: Analyzing trace with hash -6501269, now seen corresponding path program 646 times [2021-06-05 14:49:27,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:27,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264143887] [2021-06-05 14:49:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:27,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:27,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264143887] [2021-06-05 14:49:27,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264143887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:27,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312386271] [2021-06-05 14:49:27,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:27,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:27,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:27,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:27,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:27,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:27,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:27,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:27,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:27,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:27,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:27,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:27,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:27,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:27,824 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:27,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:27,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:27,863 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:166, output treesize:79 [2021-06-05 14:49:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:28,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312386271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:28,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:28,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:28,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696372412] [2021-06-05 14:49:28,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:28,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:28,003 INFO L87 Difference]: Start difference. First operand 196 states and 416 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:29,015 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 14:49:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:29,156 INFO L93 Difference]: Finished difference Result 284 states and 564 transitions. [2021-06-05 14:49:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:49:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:29,157 INFO L225 Difference]: With dead ends: 284 [2021-06-05 14:49:29,157 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 14:49:29,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1190.3ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:49:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 14:49:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 197. [2021-06-05 14:49:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.13265306122449) internal successors, (418), 196 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 418 transitions. [2021-06-05 14:49:29,159 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 418 transitions. Word has length 20 [2021-06-05 14:49:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:29,159 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 418 transitions. [2021-06-05 14:49:29,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 418 transitions. [2021-06-05 14:49:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:29,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:29,159 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:29,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37332,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:29,360 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash -541731071, now seen corresponding path program 647 times [2021-06-05 14:49:29,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:29,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104720398] [2021-06-05 14:49:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:29,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:29,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104720398] [2021-06-05 14:49:29,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104720398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:29,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918363830] [2021-06-05 14:49:29,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:29,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:49:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:29,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:29,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:29,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:29,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:29,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:29,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:29,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:29,968 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:29,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:29,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:29,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:30,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:30,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:30,018 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-06-05 14:49:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:30,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918363830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:30,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:30,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:49:30,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980019718] [2021-06-05 14:49:30,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:49:30,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:49:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:30,150 INFO L87 Difference]: Start difference. First operand 197 states and 418 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:30,486 INFO L93 Difference]: Finished difference Result 235 states and 487 transitions. [2021-06-05 14:49:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:49:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:30,487 INFO L225 Difference]: With dead ends: 235 [2021-06-05 14:49:30,487 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 14:49:30,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 14:49:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2021-06-05 14:49:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.13265306122449) internal successors, (418), 196 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 418 transitions. [2021-06-05 14:49:30,488 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 418 transitions. Word has length 20 [2021-06-05 14:49:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:30,488 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 418 transitions. [2021-06-05 14:49:30,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 418 transitions. [2021-06-05 14:49:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:30,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:30,489 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:30,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37358 [2021-06-05 14:49:30,689 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash 46014251, now seen corresponding path program 648 times [2021-06-05 14:49:30,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:30,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400666969] [2021-06-05 14:49:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:30,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400666969] [2021-06-05 14:49:30,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400666969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070655384] [2021-06-05 14:49:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:31,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:49:31,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:31,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:31,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:31,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:31,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:31,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,889 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:31,908 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,912 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:31,920 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,924 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:31,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:31,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:31,934 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:31,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:31,938 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:32,036 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:49:32,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:32,041 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:32,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:32,045 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:32,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:32,054 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:32,057 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:32,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:32,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:32,098 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:49:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:32,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070655384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:32,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:32,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:32,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921337857] [2021-06-05 14:49:32,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:32,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:32,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:32,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:32,235 INFO L87 Difference]: Start difference. First operand 197 states and 418 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:33,275 INFO L93 Difference]: Finished difference Result 301 states and 602 transitions. [2021-06-05 14:49:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:49:33,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:33,276 INFO L225 Difference]: With dead ends: 301 [2021-06-05 14:49:33,276 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 14:49:33,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1199.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:49:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 14:49:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 201. [2021-06-05 14:49:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.15) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 430 transitions. [2021-06-05 14:49:33,278 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 430 transitions. Word has length 20 [2021-06-05 14:49:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:33,278 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 430 transitions. [2021-06-05 14:49:33,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 430 transitions. [2021-06-05 14:49:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:33,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:33,278 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:33,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37379,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:33,479 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:33,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1086250049, now seen corresponding path program 649 times [2021-06-05 14:49:33,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:33,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733211316] [2021-06-05 14:49:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:33,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733211316] [2021-06-05 14:49:33,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733211316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659436633] [2021-06-05 14:49:33,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:33,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:34,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:49:34,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:34,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:34,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:34,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,648 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,653 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:34,659 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,664 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:34,669 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,674 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:34,680 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,685 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:34,690 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,695 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:34,700 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,705 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:34,709 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:34,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:34,713 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,862 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 14:49:34,862 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:49:34,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:34,866 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:34,870 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:34,874 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:34,877 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:34,881 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:34,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:34,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:49:34,941 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-06-05 14:49:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:35,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659436633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:35,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:35,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:49:35,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668163803] [2021-06-05 14:49:35,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:35,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:35,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:35,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:35,128 INFO L87 Difference]: Start difference. First operand 201 states and 430 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:35,264 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 14:49:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:36,008 INFO L93 Difference]: Finished difference Result 238 states and 502 transitions. [2021-06-05 14:49:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:49:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:36,009 INFO L225 Difference]: With dead ends: 238 [2021-06-05 14:49:36,009 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 14:49:36,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:49:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 14:49:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2021-06-05 14:49:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.154228855721393) internal successors, (433), 201 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 433 transitions. [2021-06-05 14:49:36,011 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 433 transitions. Word has length 20 [2021-06-05 14:49:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:36,011 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 433 transitions. [2021-06-05 14:49:36,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 433 transitions. [2021-06-05 14:49:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:36,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:36,011 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:36,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37472 [2021-06-05 14:49:36,212 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 367923539, now seen corresponding path program 650 times [2021-06-05 14:49:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:36,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553945839] [2021-06-05 14:49:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:36,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:36,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553945839] [2021-06-05 14:49:36,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553945839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:36,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891865584] [2021-06-05 14:49:36,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:36,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:37,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:37,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:37,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:37,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:37,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:37,522 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,526 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,530 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:37,535 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,539 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:37,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:37,543 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:37,546 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,607 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:37,611 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:37,614 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:37,617 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:37,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:37,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:37,643 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:49:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:37,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891865584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:37,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:37,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:49:37,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284974767] [2021-06-05 14:49:37,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:37,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:37,759 INFO L87 Difference]: Start difference. First operand 202 states and 433 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:38,195 INFO L93 Difference]: Finished difference Result 240 states and 505 transitions. [2021-06-05 14:49:38,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:49:38,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:38,196 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:49:38,196 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:49:38,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 781.3ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:49:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:49:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2021-06-05 14:49:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1519607843137254) internal successors, (439), 204 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 439 transitions. [2021-06-05 14:49:38,197 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 439 transitions. Word has length 20 [2021-06-05 14:49:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:38,197 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 439 transitions. [2021-06-05 14:49:38,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 439 transitions. [2021-06-05 14:49:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:38,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:38,198 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:38,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37677 [2021-06-05 14:49:38,398 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1530567273, now seen corresponding path program 651 times [2021-06-05 14:49:38,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:38,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908885953] [2021-06-05 14:49:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:38,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908885953] [2021-06-05 14:49:38,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908885953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324424078] [2021-06-05 14:49:38,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:38,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:39,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:39,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:39,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,636 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,640 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:39,645 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:39,650 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:39,654 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:39,659 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:39,662 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,724 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:39,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:39,728 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:39,731 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:39,734 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:39,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:39,760 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:49:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:39,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324424078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:39,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:39,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:49:39,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245077332] [2021-06-05 14:49:39,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:39,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:39,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:39,878 INFO L87 Difference]: Start difference. First operand 205 states and 439 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:40,185 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 14:49:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:40,320 INFO L93 Difference]: Finished difference Result 237 states and 499 transitions. [2021-06-05 14:49:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:49:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:40,320 INFO L225 Difference]: With dead ends: 237 [2021-06-05 14:49:40,320 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:49:40,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 770.4ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:49:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:49:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2021-06-05 14:49:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.151219512195122) internal successors, (441), 205 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 441 transitions. [2021-06-05 14:49:40,322 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 441 transitions. Word has length 20 [2021-06-05 14:49:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:40,322 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 441 transitions. [2021-06-05 14:49:40,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 441 transitions. [2021-06-05 14:49:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:40,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:40,322 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:40,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37803 [2021-06-05 14:49:40,523 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1733327059, now seen corresponding path program 652 times [2021-06-05 14:49:40,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:40,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256484886] [2021-06-05 14:49:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:40,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:40,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256484886] [2021-06-05 14:49:40,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256484886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:40,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486251149] [2021-06-05 14:49:40,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:40,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:41,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:41,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:41,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:41,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,920 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:41,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:41,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:41,935 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,943 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,946 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,950 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:41,953 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:41,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:41,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:41,957 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:42,017 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:42,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:42,020 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:42,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:42,023 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:42,026 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:42,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:42,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:42,052 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:49:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:42,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486251149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:42,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:42,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:49:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942539634] [2021-06-05 14:49:42,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:42,167 INFO L87 Difference]: Start difference. First operand 206 states and 441 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,495 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 14:49:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:42,614 INFO L93 Difference]: Finished difference Result 234 states and 493 transitions. [2021-06-05 14:49:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:49:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:42,615 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:49:42,615 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:49:42,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 822.5ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:49:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:49:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 207. [2021-06-05 14:49:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2021-06-05 14:49:42,616 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 20 [2021-06-05 14:49:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:42,616 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2021-06-05 14:49:42,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2021-06-05 14:49:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:42,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:42,617 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:42,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38032,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:42,817 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash -239596009, now seen corresponding path program 653 times [2021-06-05 14:49:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840228981] [2021-06-05 14:49:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:43,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840228981] [2021-06-05 14:49:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840228981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043652000] [2021-06-05 14:49:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:43,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:43,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:43,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:43,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:43,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:43,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:43,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:43,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:43,974 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:43,979 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:43,983 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:43,987 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:43,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:43,992 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:43,996 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:43,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:44,000 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:44,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:44,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:44,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:44,004 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:44,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:44,007 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:44,068 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:44,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:44,072 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:44,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:44,075 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:44,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:44,078 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:44,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:44,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:44,104 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:49:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:44,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043652000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:44,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:44,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:49:44,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546367662] [2021-06-05 14:49:44,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:44,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:44,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:44,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:44,222 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:44,599 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:49:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:44,702 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 14:49:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:49:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:44,702 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:49:44,702 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:49:44,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 803.5ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:49:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:49:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2021-06-05 14:49:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1497584541062804) internal successors, (445), 207 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2021-06-05 14:49:44,704 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 20 [2021-06-05 14:49:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:44,704 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2021-06-05 14:49:44,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2021-06-05 14:49:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:44,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:44,705 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:44,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38201,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:44,905 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash -718880685, now seen corresponding path program 654 times [2021-06-05 14:49:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:44,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642076036] [2021-06-05 14:49:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:45,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642076036] [2021-06-05 14:49:45,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642076036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804571658] [2021-06-05 14:49:45,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:45,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:49:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:46,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:46,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:46,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:46,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,413 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:46,425 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:46,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,435 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:49:46,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:46,447 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,452 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:46,458 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:46,464 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,469 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,473 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,478 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:46,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:46,483 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:46,487 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,629 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 14:49:46,629 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-06-05 14:49:46,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:46,634 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:46,638 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:46,641 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:46,645 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:46,649 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:46,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:46,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:49:46,710 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:49:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:46,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804571658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:46,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:46,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:49:46,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559233649] [2021-06-05 14:49:46,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:46,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:46,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:46,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:46,933 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:47,424 INFO L93 Difference]: Finished difference Result 230 states and 485 transitions. [2021-06-05 14:49:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:49:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:47,425 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:49:47,425 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:49:47,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 914.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:49:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:49:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 204. [2021-06-05 14:49:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1527093596059115) internal successors, (437), 203 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 437 transitions. [2021-06-05 14:49:47,427 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 437 transitions. Word has length 20 [2021-06-05 14:49:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:47,427 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 437 transitions. [2021-06-05 14:49:47,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 437 transitions. [2021-06-05 14:49:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:47,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:47,427 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:47,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38358,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:47,627 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:47,628 INFO L82 PathProgramCache]: Analyzing trace with hash 651971393, now seen corresponding path program 655 times [2021-06-05 14:49:47,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:47,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371565451] [2021-06-05 14:49:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:47,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:47,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371565451] [2021-06-05 14:49:47,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371565451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:47,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212737017] [2021-06-05 14:49:47,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:48,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:48,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:48,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:48,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:48,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:48,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:48,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:48,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:48,665 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:48,669 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:48,673 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:48,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:48,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:48,681 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,733 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:49:48,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:48,736 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:48,739 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:48,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:48,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:48,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:48,764 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:49:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:48,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212737017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:48,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:48,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:49:48,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194516695] [2021-06-05 14:49:48,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:48,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:48,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:48,843 INFO L87 Difference]: Start difference. First operand 204 states and 437 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:49,217 INFO L93 Difference]: Finished difference Result 232 states and 483 transitions. [2021-06-05 14:49:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:49:49,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:49,217 INFO L225 Difference]: With dead ends: 232 [2021-06-05 14:49:49,217 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:49:49,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:49:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 206. [2021-06-05 14:49:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.151219512195122) internal successors, (441), 205 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 441 transitions. [2021-06-05 14:49:49,219 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 441 transitions. Word has length 20 [2021-06-05 14:49:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:49,219 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 441 transitions. [2021-06-05 14:49:49,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 441 transitions. [2021-06-05 14:49:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:49,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:49,219 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:49,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38657 [2021-06-05 14:49:49,420 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash -379101571, now seen corresponding path program 656 times [2021-06-05 14:49:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:49,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362224187] [2021-06-05 14:49:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:49,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:49,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362224187] [2021-06-05 14:49:49,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362224187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:49,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990202842] [2021-06-05 14:49:49,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:49,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:49,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:49,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:50,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:50,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:50,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:50,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:50,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:50,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:50,503 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:50,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:50,510 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:50,514 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:50,517 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:50,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:50,521 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,574 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:49:50,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:50,577 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:50,580 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:50,583 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:50,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:50,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:50,605 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:49:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:50,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990202842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:50,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:50,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:49:50,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570433019] [2021-06-05 14:49:50,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:50,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:50,686 INFO L87 Difference]: Start difference. First operand 206 states and 441 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:51,160 INFO L93 Difference]: Finished difference Result 234 states and 493 transitions. [2021-06-05 14:49:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:49:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:51,161 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:49:51,161 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:49:51,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 695.1ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:49:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:49:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 207. [2021-06-05 14:49:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2021-06-05 14:49:51,163 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 20 [2021-06-05 14:49:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:51,163 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2021-06-05 14:49:51,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2021-06-05 14:49:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:51,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:51,163 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:51,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38745 [2021-06-05 14:49:51,363 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1942942657, now seen corresponding path program 657 times [2021-06-05 14:49:51,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:51,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946729305] [2021-06-05 14:49:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:51,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:51,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946729305] [2021-06-05 14:49:51,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946729305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:51,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707223770] [2021-06-05 14:49:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:52,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:52,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:52,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:52,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:52,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:52,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:52,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:52,423 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:52,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:52,432 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:52,435 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:52,440 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:52,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:52,444 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,503 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:49:52,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:52,506 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:52,509 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:52,512 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:52,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:52,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:52,534 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:49:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:52,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707223770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:52,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:52,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 14:49:52,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99667650] [2021-06-05 14:49:52,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:52,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:52,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:52,619 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:53,014 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 14:49:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:49:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:53,015 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:49:53,015 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:49:53,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:49:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:49:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2021-06-05 14:49:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1497584541062804) internal successors, (445), 207 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2021-06-05 14:49:53,016 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 20 [2021-06-05 14:49:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:53,016 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2021-06-05 14:49:53,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2021-06-05 14:49:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:53,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:53,017 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:53,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38894,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:53,217 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1463657981, now seen corresponding path program 658 times [2021-06-05 14:49:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:53,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572071982] [2021-06-05 14:49:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:53,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:53,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572071982] [2021-06-05 14:49:53,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572071982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:53,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187380632] [2021-06-05 14:49:53,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:53,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:53,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:54,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:54,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:54,600 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:54,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:54,611 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:54,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,621 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:54,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:54,631 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,635 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:54,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:54,640 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,644 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:54,648 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,744 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:49:54,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:54,748 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:54,752 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:54,756 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:54,759 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:54,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:54,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:54,799 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:49:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:54,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187380632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:54,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:54,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:49:54,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176617464] [2021-06-05 14:49:54,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:54,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:54,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:54,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:54,950 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:55,086 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-05 14:49:55,804 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-06-05 14:49:55,967 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 14:49:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:56,438 INFO L93 Difference]: Finished difference Result 324 states and 654 transitions. [2021-06-05 14:49:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:49:56,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:56,439 INFO L225 Difference]: With dead ends: 324 [2021-06-05 14:49:56,439 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 14:49:56,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1700.6ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:49:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 14:49:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 205. [2021-06-05 14:49:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1519607843137254) internal successors, (439), 204 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 439 transitions. [2021-06-05 14:49:56,441 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 439 transitions. Word has length 20 [2021-06-05 14:49:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:56,441 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 439 transitions. [2021-06-05 14:49:56,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 439 transitions. [2021-06-05 14:49:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:56,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:56,441 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:56,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38977 [2021-06-05 14:49:56,642 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash 661134227, now seen corresponding path program 659 times [2021-06-05 14:49:56,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:56,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515179814] [2021-06-05 14:49:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:56,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515179814] [2021-06-05 14:49:56,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515179814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203124890] [2021-06-05 14:49:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:57,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:49:57,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:57,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:57,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:57,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:57,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:57,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:57,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:57,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:57,764 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:57,769 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:57,774 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:57,779 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:57,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:57,784 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:57,787 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:57,791 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,852 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:57,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:57,856 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:57,859 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:57,862 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:57,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:57,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:57,888 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:49:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:58,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203124890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:58,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:58,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:49:58,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762191657] [2021-06-05 14:49:58,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:49:58,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:58,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:49:58,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:58,001 INFO L87 Difference]: Start difference. First operand 205 states and 439 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,295 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:49:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:58,328 INFO L93 Difference]: Finished difference Result 230 states and 480 transitions. [2021-06-05 14:49:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:49:58,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:49:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:58,329 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:49:58,329 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 14:49:58,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:58,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 14:49:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2021-06-05 14:49:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2021-06-05 14:49:58,331 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 20 [2021-06-05 14:49:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:58,331 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2021-06-05 14:49:58,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2021-06-05 14:49:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:49:58,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:58,331 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:58,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39077,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:58,531 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:58,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1311788841, now seen corresponding path program 660 times [2021-06-05 14:49:58,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:58,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137129139] [2021-06-05 14:49:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:58,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:58,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137129139] [2021-06-05 14:49:58,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137129139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:58,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626624148] [2021-06-05 14:49:58,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:58,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:49:58,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:58,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:49:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:59,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:59,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:59,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:49:59,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,541 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:49:59,546 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,550 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:49:59,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,559 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,563 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:49:59,567 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:59,571 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:49:59,574 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,636 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:49:59,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:49:59,639 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:49:59,643 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:49:59,646 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:59,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:49:59,672 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:49:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:59,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626624148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:59,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:59,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:49:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964291196] [2021-06-05 14:49:59,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:59,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:59,766 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:00,258 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 14:50:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:50:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:00,259 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:50:00,259 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:50:00,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:50:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:50:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2021-06-05 14:50:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1497584541062804) internal successors, (445), 207 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2021-06-05 14:50:00,260 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 20 [2021-06-05 14:50:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:00,261 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2021-06-05 14:50:00,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2021-06-05 14:50:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:00,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:00,261 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:00,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39282,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:00,461 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1791073517, now seen corresponding path program 661 times [2021-06-05 14:50:00,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:00,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500196359] [2021-06-05 14:50:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:00,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:00,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500196359] [2021-06-05 14:50:00,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500196359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:00,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73657612] [2021-06-05 14:50:00,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:01,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:50:01,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:01,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:01,782 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,787 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:01,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,802 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:01,808 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,812 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:01,817 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:01,823 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,827 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:01,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:01,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:01,836 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,943 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 14:50:01,943 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:50:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:01,947 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:01,951 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:01,955 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:01,958 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:02,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:02,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:50:02,004 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:50:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:02,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73657612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:02,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:02,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:02,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778295997] [2021-06-05 14:50:02,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:02,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:02,162 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:02,607 INFO L93 Difference]: Finished difference Result 230 states and 485 transitions. [2021-06-05 14:50:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:50:02,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:02,608 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:50:02,608 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:50:02,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 702.4ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:50:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:50:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2021-06-05 14:50:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.151219512195122) internal successors, (441), 205 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 441 transitions. [2021-06-05 14:50:02,610 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 441 transitions. Word has length 20 [2021-06-05 14:50:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:02,610 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 441 transitions. [2021-06-05 14:50:02,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 441 transitions. [2021-06-05 14:50:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:02,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:02,610 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:02,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39377,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:02,810 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash -724043519, now seen corresponding path program 662 times [2021-06-05 14:50:02,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:02,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462552390] [2021-06-05 14:50:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:03,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:03,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462552390] [2021-06-05 14:50:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462552390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:03,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386757415] [2021-06-05 14:50:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:03,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:03,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:03,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:03,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:03,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:03,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:03,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:03,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:03,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:03,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:03,454 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:50:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:03,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386757415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:03,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:03,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:03,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119628553] [2021-06-05 14:50:03,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:03,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:03,533 INFO L87 Difference]: Start difference. First operand 206 states and 441 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:03,868 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 14:50:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:50:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:03,868 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:50:03,868 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 14:50:03,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:50:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 14:50:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2021-06-05 14:50:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1497584541062804) internal successors, (445), 207 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2021-06-05 14:50:03,870 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 20 [2021-06-05 14:50:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:03,870 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2021-06-05 14:50:03,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2021-06-05 14:50:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:03,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:03,871 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:04,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39615,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:04,081 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1203328195, now seen corresponding path program 663 times [2021-06-05 14:50:04,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:04,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163360998] [2021-06-05 14:50:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:04,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163360998] [2021-06-05 14:50:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163360998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699543148] [2021-06-05 14:50:04,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:04,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:50:04,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:04,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:04,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:04,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:04,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:04,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:04,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:04,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:04,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:04,732 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:04,735 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:04,738 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:04,742 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:04,745 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:04,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:04,793 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-06-05 14:50:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:04,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699543148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:04,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:04,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:50:04,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279956818] [2021-06-05 14:50:04,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:50:04,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:50:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:04,967 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:05,635 INFO L93 Difference]: Finished difference Result 271 states and 556 transitions. [2021-06-05 14:50:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:50:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:05,635 INFO L225 Difference]: With dead ends: 271 [2021-06-05 14:50:05,635 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 14:50:05,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:50:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 14:50:05,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 207. [2021-06-05 14:50:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.150485436893204) internal successors, (443), 206 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 443 transitions. [2021-06-05 14:50:05,637 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 443 transitions. Word has length 20 [2021-06-05 14:50:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:05,637 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 443 transitions. [2021-06-05 14:50:05,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 443 transitions. [2021-06-05 14:50:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:05,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:05,638 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:05,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39635 [2021-06-05 14:50:05,838 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:05,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1738557997, now seen corresponding path program 664 times [2021-06-05 14:50:05,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:05,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218453220] [2021-06-05 14:50:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:06,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:06,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218453220] [2021-06-05 14:50:06,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218453220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:06,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070170333] [2021-06-05 14:50:06,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:06,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:06,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:06,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:06,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:06,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:06,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:06,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:06,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:06,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:06,445 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:06,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:06,513 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:06,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:06,520 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:06,524 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:06,527 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:06,531 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:06,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:06,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:50:06,585 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:241, output treesize:125 [2021-06-05 14:50:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070170333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:06,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:06,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:50:06,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893346907] [2021-06-05 14:50:06,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:50:06,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:50:06,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:06,783 INFO L87 Difference]: Start difference. First operand 207 states and 443 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:07,280 INFO L93 Difference]: Finished difference Result 236 states and 499 transitions. [2021-06-05 14:50:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:50:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:07,281 INFO L225 Difference]: With dead ends: 236 [2021-06-05 14:50:07,281 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 14:50:07,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 721.4ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:50:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 14:50:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 206. [2021-06-05 14:50:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.151219512195122) internal successors, (441), 205 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 441 transitions. [2021-06-05 14:50:07,283 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 441 transitions. Word has length 20 [2021-06-05 14:50:07,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:07,283 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 441 transitions. [2021-06-05 14:50:07,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 441 transitions. [2021-06-05 14:50:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:07,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:07,283 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:07,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39666,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:07,488 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash -408806697, now seen corresponding path program 665 times [2021-06-05 14:50:07,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:07,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983700472] [2021-06-05 14:50:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:07,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983700472] [2021-06-05 14:50:07,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983700472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512838911] [2021-06-05 14:50:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:08,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:08,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:08,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:08,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,742 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:08,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:50:08,752 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,756 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:08,760 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:08,768 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:08,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,775 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,828 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:50:08,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:08,831 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:08,834 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:08,837 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:08,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:08,859 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:50:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512838911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:08,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:08,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:50:08,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866939207] [2021-06-05 14:50:08,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:50:08,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:50:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:08,940 INFO L87 Difference]: Start difference. First operand 206 states and 441 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:09,360 INFO L93 Difference]: Finished difference Result 240 states and 505 transitions. [2021-06-05 14:50:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:50:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:09,361 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:50:09,361 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:50:09,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 818.0ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:50:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:50:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 209. [2021-06-05 14:50:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1490384615384617) internal successors, (447), 208 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 447 transitions. [2021-06-05 14:50:09,363 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 447 transitions. Word has length 20 [2021-06-05 14:50:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:09,363 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 447 transitions. [2021-06-05 14:50:09,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 447 transitions. [2021-06-05 14:50:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:09,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:09,363 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:09,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39694 [2021-06-05 14:50:09,563 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1439879661, now seen corresponding path program 666 times [2021-06-05 14:50:09,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:09,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219189490] [2021-06-05 14:50:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:09,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219189490] [2021-06-05 14:50:09,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219189490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275553298] [2021-06-05 14:50:09,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:10,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:10,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:10,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:10,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:10,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:10,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:10,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:10,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:10,817 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:10,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:10,824 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:10,828 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:10,832 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:10,836 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,888 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:50:10,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:10,891 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:10,895 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:10,898 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:10,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:10,919 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-06-05 14:50:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:11,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275553298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:11,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:11,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:50:11,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104831621] [2021-06-05 14:50:11,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:50:11,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:50:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:11,001 INFO L87 Difference]: Start difference. First operand 209 states and 447 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,294 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 14:50:11,701 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:50:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:11,849 INFO L93 Difference]: Finished difference Result 247 states and 519 transitions. [2021-06-05 14:50:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:50:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:11,850 INFO L225 Difference]: With dead ends: 247 [2021-06-05 14:50:11,850 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 14:50:11,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1162.8ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:50:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 14:50:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 210. [2021-06-05 14:50:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.148325358851675) internal successors, (449), 209 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 449 transitions. [2021-06-05 14:50:11,851 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 449 transitions. Word has length 20 [2021-06-05 14:50:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:11,852 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 449 transitions. [2021-06-05 14:50:11,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,852 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 449 transitions. [2021-06-05 14:50:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:11,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:11,852 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:12,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 667 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39811 [2021-06-05 14:50:12,052 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:12,052 INFO L82 PathProgramCache]: Analyzing trace with hash 882164567, now seen corresponding path program 667 times [2021-06-05 14:50:12,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:12,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958251510] [2021-06-05 14:50:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:12,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958251510] [2021-06-05 14:50:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958251510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890643045] [2021-06-05 14:50:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:12,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:13,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:13,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:13,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:13,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,318 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:13,323 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:13,328 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,331 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,335 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,339 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:50:13,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:13,347 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:13,350 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,403 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-06-05 14:50:13,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:13,406 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:13,410 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:13,413 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:13,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:13,435 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-06-05 14:50:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:13,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890643045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:13,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:13,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:50:13,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681757136] [2021-06-05 14:50:13,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:50:13,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:50:13,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:13,516 INFO L87 Difference]: Start difference. First operand 210 states and 449 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:13,950 INFO L93 Difference]: Finished difference Result 234 states and 493 transitions. [2021-06-05 14:50:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:50:13,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:13,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:13,951 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:50:13,951 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:50:13,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 726.7ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:50:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:50:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 211. [2021-06-05 14:50:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1476190476190475) internal successors, (451), 210 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 451 transitions. [2021-06-05 14:50:13,953 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 451 transitions. Word has length 20 [2021-06-05 14:50:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:13,953 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 451 transitions. [2021-06-05 14:50:13,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 451 transitions. [2021-06-05 14:50:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:13,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:13,953 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:14,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39916,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:14,153 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash 402879891, now seen corresponding path program 668 times [2021-06-05 14:50:14,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:14,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659386418] [2021-06-05 14:50:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:14,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:14,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659386418] [2021-06-05 14:50:14,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659386418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:14,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6122422] [2021-06-05 14:50:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:14,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:14,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:15,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:15,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:15,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:15,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:15,423 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,432 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:15,437 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:15,443 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:50:15,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,452 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,456 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:15,461 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,466 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,470 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:15,474 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,576 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 14:50:15,576 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:50:15,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:15,580 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:15,584 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:15,588 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:15,591 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:15,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:50:15,632 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-06-05 14:50:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:15,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6122422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:15,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:15,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 14:50:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620470619] [2021-06-05 14:50:15,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:50:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:50:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:15,782 INFO L87 Difference]: Start difference. First operand 211 states and 451 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:16,258 INFO L93 Difference]: Finished difference Result 233 states and 491 transitions. [2021-06-05 14:50:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:50:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:16,259 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:50:16,259 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:50:16,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:50:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:50:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2021-06-05 14:50:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1497584541062804) internal successors, (445), 207 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2021-06-05 14:50:16,261 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 20 [2021-06-05 14:50:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:16,261 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2021-06-05 14:50:16,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2021-06-05 14:50:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:16,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:16,265 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:16,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40042 [2021-06-05 14:50:16,477 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash -399643863, now seen corresponding path program 669 times [2021-06-05 14:50:16,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:16,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601692257] [2021-06-05 14:50:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:16,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601692257] [2021-06-05 14:50:16,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601692257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6022777] [2021-06-05 14:50:16,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:16,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:50:16,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:16,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:17,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:17,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:17,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:17,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:17,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:17,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:17,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:17,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:17,579 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:17,582 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:17,587 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:17,590 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:17,594 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,654 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:50:17,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:17,657 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:17,661 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:17,663 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:17,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:17,689 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:50:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:17,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6022777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:17,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:17,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:17,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645160470] [2021-06-05 14:50:17,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:17,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:17,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:17,799 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:18,158 INFO L93 Difference]: Finished difference Result 233 states and 486 transitions. [2021-06-05 14:50:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:18,158 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:50:18,158 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 14:50:18,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:50:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 14:50:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 210. [2021-06-05 14:50:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.148325358851675) internal successors, (449), 209 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 449 transitions. [2021-06-05 14:50:18,160 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 449 transitions. Word has length 20 [2021-06-05 14:50:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:18,160 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 449 transitions. [2021-06-05 14:50:18,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 449 transitions. [2021-06-05 14:50:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:18,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:18,160 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:18,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40227 [2021-06-05 14:50:18,361 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1922400365, now seen corresponding path program 670 times [2021-06-05 14:50:18,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:18,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776660525] [2021-06-05 14:50:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:18,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:18,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776660525] [2021-06-05 14:50:18,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776660525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:18,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026409099] [2021-06-05 14:50:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:18,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:18,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:19,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:19,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:19,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:19,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:19,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,393 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:19,402 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,406 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,410 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:19,414 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:19,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:50:19,419 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,422 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:19,426 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,486 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:50:19,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:19,490 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:19,493 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:19,496 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:19,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:19,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:19,522 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:50:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:19,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026409099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:19,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:19,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:19,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290337709] [2021-06-05 14:50:19,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:19,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:19,641 INFO L87 Difference]: Start difference. First operand 210 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:19,969 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:50:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:20,056 INFO L93 Difference]: Finished difference Result 234 states and 493 transitions. [2021-06-05 14:50:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:50:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:20,057 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:50:20,057 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:50:20,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:50:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:50:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 211. [2021-06-05 14:50:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1476190476190475) internal successors, (451), 210 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 451 transitions. [2021-06-05 14:50:20,058 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 451 transitions. Word has length 20 [2021-06-05 14:50:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:20,058 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 451 transitions. [2021-06-05 14:50:20,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 451 transitions. [2021-06-05 14:50:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:20,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:20,059 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:20,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40432,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:20,259 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:20,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1443115689, now seen corresponding path program 671 times [2021-06-05 14:50:20,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:20,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25451398] [2021-06-05 14:50:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:20,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25451398] [2021-06-05 14:50:20,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25451398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145294471] [2021-06-05 14:50:20,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:20,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:50:20,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:20,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:21,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:50:21,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:50:21,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:21,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:21,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,716 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,720 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,725 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,729 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:21,735 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:21,740 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:21,746 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,750 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,754 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:21,759 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:21,764 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:21,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-06-05 14:50:21,769 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,912 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-05 14:50:21,913 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-06-05 14:50:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:21,917 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:21,921 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:21,925 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:21,929 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:21,933 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:21,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:21,993 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-06-05 14:50:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:22,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145294471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:22,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:22,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438954163] [2021-06-05 14:50:22,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:22,207 INFO L87 Difference]: Start difference. First operand 211 states and 451 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:23,197 INFO L93 Difference]: Finished difference Result 301 states and 612 transitions. [2021-06-05 14:50:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:50:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:23,198 INFO L225 Difference]: With dead ends: 301 [2021-06-05 14:50:23,198 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 14:50:23,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1238.6ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:50:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 14:50:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 209. [2021-06-05 14:50:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1490384615384617) internal successors, (447), 208 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 447 transitions. [2021-06-05 14:50:23,200 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 447 transitions. Word has length 20 [2021-06-05 14:50:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:23,200 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 447 transitions. [2021-06-05 14:50:23,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 447 transitions. [2021-06-05 14:50:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:23,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:23,200 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40589 [2021-06-05 14:50:23,401 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1784821609, now seen corresponding path program 672 times [2021-06-05 14:50:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004011825] [2021-06-05 14:50:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:23,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:23,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004011825] [2021-06-05 14:50:23,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004011825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:23,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230436004] [2021-06-05 14:50:23,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:23,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:50:23,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:23,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:23,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:23,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:23,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:24,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:24,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:24,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:24,032 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:24,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:24,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:24,056 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-06-05 14:50:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:24,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230436004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:24,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:24,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:50:24,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89234451] [2021-06-05 14:50:24,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:50:24,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:24,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:50:24,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:24,144 INFO L87 Difference]: Start difference. First operand 209 states and 447 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:24,553 INFO L93 Difference]: Finished difference Result 234 states and 493 transitions. [2021-06-05 14:50:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:50:24,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:24,553 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:50:24,553 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:50:24,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:50:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:50:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 211. [2021-06-05 14:50:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1476190476190475) internal successors, (451), 210 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 451 transitions. [2021-06-05 14:50:24,555 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 451 transitions. Word has length 20 [2021-06-05 14:50:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:24,555 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 451 transitions. [2021-06-05 14:50:24,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 451 transitions. [2021-06-05 14:50:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:24,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:24,555 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:24,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40734,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:24,756 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:24,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2030861011, now seen corresponding path program 673 times [2021-06-05 14:50:24,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:24,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518657779] [2021-06-05 14:50:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:25,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:25,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518657779] [2021-06-05 14:50:25,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518657779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:25,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471241762] [2021-06-05 14:50:25,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:25,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:25,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:25,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:25,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:25,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:25,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:25,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:25,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:25,389 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:25,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:25,396 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:25,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:25,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:25,447 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-06-05 14:50:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:25,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471241762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:25,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:25,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 14:50:25,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983518444] [2021-06-05 14:50:25,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:50:25,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:50:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:25,617 INFO L87 Difference]: Start difference. First operand 211 states and 451 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:26,040 INFO L93 Difference]: Finished difference Result 233 states and 491 transitions. [2021-06-05 14:50:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:50:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:26,041 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:50:26,041 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:50:26,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 644.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:50:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:50:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 210. [2021-06-05 14:50:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.148325358851675) internal successors, (449), 209 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 449 transitions. [2021-06-05 14:50:26,043 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 449 transitions. Word has length 20 [2021-06-05 14:50:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:26,043 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 449 transitions. [2021-06-05 14:50:26,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 449 transitions. [2021-06-05 14:50:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:26,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:26,043 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:26,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40756 [2021-06-05 14:50:26,244 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:26,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1495631209, now seen corresponding path program 674 times [2021-06-05 14:50:26,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:26,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715646691] [2021-06-05 14:50:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:26,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:26,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715646691] [2021-06-05 14:50:26,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715646691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:26,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601876572] [2021-06-05 14:50:26,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:26,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:26,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:26,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:26,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:26,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:26,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:26,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:26,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:26,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:26,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:26,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:26,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:50:26,904 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-06-05 14:50:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601876572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:27,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:27,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:27,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705497613] [2021-06-05 14:50:27,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:27,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:27,044 INFO L87 Difference]: Start difference. First operand 210 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:27,482 INFO L93 Difference]: Finished difference Result 248 states and 518 transitions. [2021-06-05 14:50:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:50:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:27,483 INFO L225 Difference]: With dead ends: 248 [2021-06-05 14:50:27,483 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 14:50:27,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:50:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 14:50:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2021-06-05 14:50:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.148325358851675) internal successors, (449), 209 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 449 transitions. [2021-06-05 14:50:27,485 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 449 transitions. Word has length 20 [2021-06-05 14:50:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:27,485 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 449 transitions. [2021-06-05 14:50:27,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 449 transitions. [2021-06-05 14:50:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:27,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:27,485 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:27,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40774,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:27,686 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1782894803, now seen corresponding path program 675 times [2021-06-05 14:50:27,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:27,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109534883] [2021-06-05 14:50:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:27,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109534883] [2021-06-05 14:50:27,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109534883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346421597] [2021-06-05 14:50:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:28,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:50:28,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:28,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:28,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:28,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:28,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:28,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:28,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:28,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:28,808 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:28,812 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:28,817 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:28,822 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:28,826 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:28,829 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:28,833 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,893 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:50:28,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:28,897 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:28,900 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:28,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:28,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:28,929 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-06-05 14:50:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346421597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:29,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:29,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109376639] [2021-06-05 14:50:29,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:29,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:29,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:29,040 INFO L87 Difference]: Start difference. First operand 210 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,337 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 14:50:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:29,367 INFO L93 Difference]: Finished difference Result 236 states and 492 transitions. [2021-06-05 14:50:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:29,368 INFO L225 Difference]: With dead ends: 236 [2021-06-05 14:50:29,368 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:50:29,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:50:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:50:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2021-06-05 14:50:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.1462264150943398) internal successors, (455), 212 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 455 transitions. [2021-06-05 14:50:29,370 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 455 transitions. Word has length 20 [2021-06-05 14:50:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:29,370 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 455 transitions. [2021-06-05 14:50:29,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 455 transitions. [2021-06-05 14:50:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:29,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:29,370 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:29,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40801 [2021-06-05 14:50:29,570 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash -190028265, now seen corresponding path program 676 times [2021-06-05 14:50:29,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:29,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894451227] [2021-06-05 14:50:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:29,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:29,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894451227] [2021-06-05 14:50:29,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894451227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:29,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456750255] [2021-06-05 14:50:29,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:30,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:30,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:30,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:30,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:30,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:30,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:30,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:30,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:30,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:30,638 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,643 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,647 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,651 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:30,656 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,659 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:50:30,664 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:30,667 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,727 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-06-05 14:50:30,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:30,730 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:30,734 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:30,737 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:30,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:30,762 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-06-05 14:50:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:30,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456750255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:30,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:30,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:30,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352212449] [2021-06-05 14:50:30,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:30,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:30,874 INFO L87 Difference]: Start difference. First operand 213 states and 455 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:31,263 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:50:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:31,374 INFO L93 Difference]: Finished difference Result 236 states and 496 transitions. [2021-06-05 14:50:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:50:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:50:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:31,374 INFO L225 Difference]: With dead ends: 236 [2021-06-05 14:50:31,374 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 14:50:31,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 794.5ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:50:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 14:50:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 214. [2021-06-05 14:50:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.1455399061032865) internal successors, (457), 213 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 457 transitions. [2021-06-05 14:50:31,376 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 457 transitions. Word has length 20 [2021-06-05 14:50:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:31,376 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 457 transitions. [2021-06-05 14:50:31,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 457 transitions. [2021-06-05 14:50:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:50:31,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:31,376 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:31,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41017,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:31,577 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -669312941, now seen corresponding path program 677 times [2021-06-05 14:50:31,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:31,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105686371] [2021-06-05 14:50:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:31,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:31,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105686371] [2021-06-05 14:50:31,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105686371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:31,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784651424] [2021-06-05 14:50:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:31,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:50:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:31,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:50:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:32,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:32,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:32,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:50:32,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-06-05 14:50:32,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,580 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:32,586 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,591 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,595 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:50:32,605 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:32,609 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-06-05 14:50:32,614 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:32,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:50:32,618 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,723 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 14:50:32,723 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-06-05 14:50:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:50:32,727 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 14:50:32,731 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:50:32,734 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 14:50:32,738 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:32,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:32,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:50:32,783 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-06-05 14:50:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:32,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784651424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:32,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:32,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 14:50:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670648478] [2021-06-05 14:50:32,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:32,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:32,960 INFO L87 Difference]: Start difference. First operand 214 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:33,104 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 14:50:33,735 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 Received shutdown request... [2021-06-05 14:50:33,844 WARN L222 SmtUtils]: Removed 7 from assertion stack [2021-06-05 14:50:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:50:34,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41148 [2021-06-05 14:50:34,045 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:50:34,046 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:50:34,048 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:50:34,048 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:50:34 BasicIcfg [2021-06-05 14:50:34,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:50:34,048 INFO L168 Benchmark]: Toolchain (without parser) took 856412.91 ms. Allocated memory was 329.3 MB in the beginning and 396.4 MB in the end (delta: 67.1 MB). Free memory was 308.5 MB in the beginning and 195.4 MB in the end (delta: 113.1 MB). Peak memory consumption was 181.0 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:34,048 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 329.3 MB. Free memory was 309.8 MB in the beginning and 309.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:50:34,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.31 ms. Allocated memory is still 329.3 MB. Free memory was 308.4 MB in the beginning and 306.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:50:34,048 INFO L168 Benchmark]: Boogie Preprocessor took 11.76 ms. Allocated memory is still 329.3 MB. Free memory was 306.9 MB in the beginning and 305.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:34,048 INFO L168 Benchmark]: RCFGBuilder took 461.19 ms. Allocated memory is still 329.3 MB. Free memory was 305.8 MB in the beginning and 304.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:34,048 INFO L168 Benchmark]: TraceAbstraction took 855910.75 ms. Allocated memory was 329.3 MB in the beginning and 396.4 MB in the end (delta: 67.1 MB). Free memory was 303.1 MB in the beginning and 195.4 MB in the end (delta: 107.7 MB). Peak memory consumption was 174.3 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:34,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 329.3 MB. Free memory was 309.8 MB in the beginning and 309.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.31 ms. Allocated memory is still 329.3 MB. Free memory was 308.4 MB in the beginning and 306.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.76 ms. Allocated memory is still 329.3 MB. Free memory was 306.9 MB in the beginning and 305.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 461.19 ms. Allocated memory is still 329.3 MB. Free memory was 305.8 MB in the beginning and 304.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 855910.75 ms. Allocated memory was 329.3 MB in the beginning and 396.4 MB in the end (delta: 67.1 MB). Free memory was 303.1 MB in the beginning and 195.4 MB in the end (delta: 107.7 MB). Peak memory consumption was 174.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (214states) and FLOYD_HOARE automaton (currently 17 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 69ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (214states) and FLOYD_HOARE automaton (currently 17 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 69ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (214states) and FLOYD_HOARE automaton (currently 17 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 69ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 855824.1ms, OverallIterations: 683, TraceHistogramMax: 4, EmptinessCheckTime: 146.9ms, AutomataDifference: 241346.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19283 SDtfs, 25788 SDslu, 131011 SDs, 0 SdLazy, 199670 SolverSat, 10821 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81938.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23386 GetRequests, 8256 SyntacticMatches, 1444 SemanticMatches, 13685 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50357 ImplicationChecksByTransitivity, 315885.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=682, InterpolantAutomatonStates: 10306, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 936.3ms AutomataMinimizationTime, 682 MinimizatonAttempts, 19920 StatesRemovedByMinimization, 678 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3154.0ms SsaConstructionTime, 9768.4ms SatisfiabilityAnalysisTime, 408278.2ms InterpolantComputationTime, 24959 NumberOfCodeBlocks, 24959 NumberOfCodeBlocksAsserted, 2471 NumberOfCheckSat, 23599 ConstructedInterpolants, 1170 QuantifiedInterpolants, 404089 SizeOfPredicates, 4021 NumberOfNonLiveVariables, 61916 ConjunctsInSsa, 17740 ConjunctsInUnsatCore, 1360 InterpolantComputations, 6 PerfectInterpolantSequences, 2081/18984 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown